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When in-memory computing meets spiking neural networks—A perspective on device-circuit-system-and-algorithm co-design Appl. Phys. Rev. (IF 11.9) Pub Date : 2024-09-23 Abhishek Moitra, Abhiroop Bhattacharjee, Yuhang Li, Youngeun Kim, Priyadarshini Panda
This review explores the intersection of bio-plausible artificial intelligence in the form of spiking neural networks (SNNs) with the analog in-memory computing (IMC) domain, highlighting their collective potential for low-power edge computing environments. Through detailed investigation at the device, circuit, and system levels, we highlight the pivotal synergies between SNNs and IMC architectures
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Ultrafast switching of trions in 2D materials by terahertz photons Nat. Photon. (IF 32.3) Pub Date : 2024-09-23 Tommaso Venanzi, Marzia Cuccu, Raul Perea-Causin, Xiaoxiao Sun, Samuel Brem, Daniel Erkensten, Takashi Taniguchi, Kenji Watanabe, Ermin Malic, Manfred Helm, Stephan Winnerl, Alexey Chernikov
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KOH-activated CoO mesoporous nanoarrays for boosted supercapacitive performance Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-20 Geng Wei, Wei Xu, Li Zhang, Wenhao Zhang, Sining Fan, Zhaomeng Wang, Puyue Xia, Haifu Huang, Shaolong Tang
Highly active transition metal oxides mesoporous materials have tremendous potential applications in energy storage and catalysis due to their great physicochemical performance. However, the regulation of porous structures still faces many challenges, and the synthesis of mesoporous materials is usually costly and long-time consuming. Herein, using CoO as the example, a strategy based on KOH activation
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Growth of VO2-ZnS thin film cavity for adaptive thermal emission Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-20 Raymond Yu, Bo K. Shrewsbury, Claire Wu, Harish Kumarasubramanian, Mythili Surendran, Jayakanth Ravichandran, Michelle L. Povinelli
Low-weight, passive, thermal-adaptive radiation technologies are needed to maintain an operable temperature for spacecraft while they experience various energy fluxes. In this study, we used a thin film coating with the Fabry–Pérot (FP) effect to enhance emissivity contrast (Δε) between VO2 phase-change states. This coating utilizes a hybrid material architecture that combines VO2 with a mid- and long-wave
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Enhanced device performance of GaN high electron mobility transistors with in situ crystalline SiN cap layer Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-20 Xin Luo, Peng Cui, Handoko Linewih, Tieying Zhang, Xinkun Yan, Siheng Chen, Liu Wang, Jiacheng Dai, Zhaojun Lin, Xiangang Xu, Jisheng Han
In this paper, a ∼2 nm in situ SiN cap layer on AlGaN barrier layer is grown, which is revealed to be crystalline using high-resolution cross-sectional transmission electron microscopy. Benefitting from superior interface quality of epitaxial crystalline SiN/AlGaN interface, the gate diodes with in situ SiN cap layer feature lower interface trap state density than that with GaN cap layer. By comparing
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Superdiffusive to ballistic transport in nonintegrable Rydberg simulator npj Quantum Inform. (IF 6.6) Pub Date : 2024-09-19 Chun Chen, Yan Chen, Xiaoqun Wang
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Coupled terahertz quantum cascade wire lasers Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-19 Marie C. Ertl, Michael Jaidl, Benedikt Limbacher, Dominik Theiner, Miriam Giparakis, Stefania Isceri, Maximilian Beiser, Aaron Maxwell Andrews, Gottfried Strasser, Juraj Darmo, Karl Unterrainer
We present mutual optical coupling in terahertz (THz) quantum cascade wire laser arrays that are flip-chip bonded to a dielectric substrate. The mounting substrate is patterned for individual electrical contacting of each wire laser of the array. The resulting sandwich-like structure supports wire laser modes with a significant part propagating outside the cavity and mediates the long range coupling
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Single-shot polarization detection with a highly scattering system Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-19 Haokai Gong, Xiaomin Yang, Yangjian Cai, Qian Zhao
Polarization detection plays a significant role in optics. However, the current detection methods usually involve mechanically rotating components, multiple measurement steps, complicated optical design, and precise microfabrication process. To address this issue, we propose a single-shot method to detect the polarization state of light based on a highly scattering system, which is constituted by a
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Chip-scale sub-Doppler atomic spectroscopy enabled by a metasurface integrated photonic emitter Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-19 Alexander Yulaev, Chad Ropp, John Kitching, Vladimir A. Aksyuk, Matthew T. Hummon
We demonstrate chip-scale sub-Doppler spectroscopy in an integrated and fiber-coupled photonic-metasurface device. The device is a stack of three planar components: a photonic mode expanding grating emitter circuit with a monolithically integrated tilt-compensating dielectric metasurface, a microfabricated atomic vapor cell, and a mirror. The metasurface photonic circuit efficiently emits a 130 μm
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Regulating phase homogeneity by self-assembled molecules for enhanced efficiency and stability of inverted perovskite solar cells Nat. Photon. (IF 32.3) Pub Date : 2024-09-18 Xi Wang, Jia Li, Renjun Guo, Xinxing Yin, Ran Luo, Dengyang Guo, Kangyu Ji, Linjie Dai, Haoming Liang, Xiangkun Jia, Jinxi Chen, Zhenrong Jia, Zhuojie Shi, Shunchang Liu, Yuduan Wang, Qilin Zhou, Tao Wang, Guangjiu Pan, Peter Müller-Buschbaum, Samuel D. Stranks, Yi Hou
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An UHF band planar resonator temperature sensor constructed from high-performance titanium dioxide system microwave dielectric ceramics: Toward integrated ceramic-based sensor devices Appl. Phys. Rev. (IF 11.9) Pub Date : 2024-09-18 Yaoxing Wang, Mingkun Du, Lingxia Li
With the rapid fusion of temperature sensing technology and microwave technology, microwave temperature sensors have become the protagonist of competing research. We propose a planar resonator temperature sensor that combines substrate material modifications with sensor structure design. To realize this concept, high-performance TiO2-xwt. % ZnO (0 ≤ x ≤ 3) microwave dielectric ceramics are prepared
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Sliding-reversible bandgap modulation in irreversible asymmetric multilayers Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-18 Changming Ke, Yudi Yang, Zhuang Qian, Shi Liu
The electronic bandgap of a material is often fixed after fabrication. The capability to realize on-demand and nonvolatile control over the bandgap will unlock exciting opportunities for adaptive devices with enhanced functionalities and efficiency. We introduce a general design principle for on-demand and nonvolatile control of bandgap values, which utilizes reversible sliding-induced polarization
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High switching ratio of antiferromagnetic order in thick sputtered Mn3+xSn1−x films by spin–orbit torque Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-18 Houning Song, Dong Wang, Yuzhi Xing, Wenxiao Zhao, Chen Qi, Lin Wei, Shishen Yan, Yufeng Tian, Lihui Bai, Yanxue Chen
Electrical manipulation of the antiferromagnetic states of Weyl semimetal Mn3Sn by current-induced spin–orbit torque (SOT) has attracted intensive attention recently, largely due to its potential advantage for high-density integration and ultrafast operation. In this study, the relation between the antiferromagnetic SOT switching ratio and the composition of Mn3+xSn1−x films was explored systematically
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Efficient anti-frosting enabled by femtosecond laser-induced salt-philic and superhydrophobic surface Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-18 Qinwen Deng, Tingni Wu, Kai Yin, Xun Li, Lingxiao Wang, Qiaoqiao Huang, Yin Huang, Christopher J. Arnusch, Ji-An Duan
Frost formation is a normal phase transition phenomenon in cold climates, while it usually brings certain troubles to human lives and production. Therefore, it is of great significance to develop frost resistant materials and key technologies. Here, a salt-philic and superhydrophobic surface is designed on a PDMS substrate by femtosecond laser direct writing technology in combination with salt–ethanol–water
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Control of chiral damping in magnetic trilayers using He+ ion irradiation Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-18 Rakhul Raj, K. Saravanan, S. Amirthapandian, V. Raghavendra Reddy
In the forefront of spintronic advancements, structures with strong perpendicular magnetic anisotropy (PMA) such as Pt/Co/Pt are essential for the miniaturization and performance enhancement of high-density magnetic storage technologies. The robust PMA characteristic of these systems facilitates the development of scalable spintronic devices, crucial for next-generation magnetic memory applications
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Revealing two-dimensional electric field crowding effect in breakdown performance of DPPT-TT polymer-based OFETs Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-18 Yabin Mou, Jun Zhang, Yiwei Ma, Shi Huang, Hengdian Chang, Haonan Lin, Xuanyu Gu, Zhiyao Wu, Jiafei Yao, Kemeng Yang, Jing Chen, Man Li, Guobin Zhang, Song Bai, Yufeng Guo
The diketopyrrolopyrrole-based polymer (DPPT-TT) has been employed in organic power field effect transistors due to its exceptional off-state breakdown performance. The impact of organic semiconductor layer thickness on the breakdown performance has not been explored. In this study, we investigate the impact of DPPT-TT layer thickness on the breakdown voltage (BV) by fabricating organic field effect
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Feasibility of the Josephson voltage and current standards on a single chip Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-18 Rais S. Shaikhaidarov, Ilya Antonov, Kyung Ho Kim, Artem Shesterikov, Sven Linzen, Evgeni V. Il'ichev, Vladimir N Antonov, Oleg V Astafiev
The quantum Josephson voltage standard is well established across the metrology community for many years. It relies on the synchronization of the flux tunneling in the S/I/S Josephson junctions (JJ) with the microwave radiation (MW) of frequency f such that V=Φ0fm, where m = 0, 1, 2, …. The phenomenon is called the Shapiro steps. Together with the quantum Hall resistance standard, the voltage standard
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Shaping 3D diffraction patterns with a binary aperture Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-18 Panpan Yu, Xiaolong Chen, Jinghan Zhuang, Yijing Wu, Ziqiang Wang, Yinmei Li, Mincheng Zhong, Lei Gong
In this Letter, we report an approach for the inverse design of binary apertures to generate desired three-dimensional (3D) diffraction patterns in free space. The approach relies on an optimal accumulation algorithm, aiming to determine the distribution of the binary aperture for 3D target patterns in the regime of Fresnel diffraction. This algorithm features high fidelity for complex inverse design
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Interdigitated-comb piezoelectric phononic crystals for innovative SAW devices Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-18 R. Alcorta Galván, C. Croënne, B. Dubus, E. Eustache, A. Ngabonziza, A.-C. Hladky-Hennion
In this paper, piezoelectric phononic crystals made up of interdigitated combs in floating potential condition are studied. Calculation of the dispersion curves shows that, in addition to Bragg bandgaps due to the presence of periodic electrodes, supplementary bandgaps are present corresponding to electrical resonance/antiresonance of the comb pairs. Calculation of the reflection coefficient of finite-sized
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Selective incorporation of antimony into gallium nitride Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-18 Yujie Liu, Ishtiaque Ahmed Navid, Zetian Mi, Emmanouil Kioupakis
Dilute concentrations of antimony (Sb) incorporation into GaN induce strong bandgap bowing and tunable room-temperature photoluminescence from the UV to the green spectral regions. However, the atomistic details of the incorporation of Sb into the GaN host remain unclear. In this work, we use first-principles calculations to understand the thermodynamics of Sb substitution into GaN and its effect on
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Influence of carrier localization on photoluminescence emission from sub-monolayer quantum dot layers Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-18 T.-Y. Huang, T. Borrely, Y.-C. Yang, A. Alzeidan, G. M. Jacobsen, M. D. Teodoro, A. A. Quivy, R. S. Goldman
We have investigated the origins of photoluminescence from quantum dot (QD) layers prepared by alternating depositions of sub-monolayers and a few monolayers of size-mismatched species, termed as sub-monolayer (SML) epitaxy, in comparison with their Stranski–Krastanov (SK) QD counterparts. Using measured nanostructure sizes and local In-compositions from local-electrode atom probe tomography as input
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Interface modeling analysis using density functional theory in highly reliable Pt/HfO2/TaOx/Ta self-rectifying memristor Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-18 Sheng-Guang Ren, Ge-Qi Mao, Yi-Bai Xue, Yu Zhang, Jia-Yi Sun, Wen-Bin Zuo, Yi Li, Kan-Hao Xue, Xiang-Shui Miao
The self-rectifying memristor (SRM) is a promising device prototype for high-density three-dimensional (3D) integration and high-efficiency in-memory computing (IMC) by virtue of its ability to effectively suppress sneak current, simple device structure, and low energy consumption. Theoretically understanding the intrinsic mechanisms of SRM is a matter of concern. Here, we fabricated a Ta/TaOx/HfO2/Pt-stacked
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Hollow cylindrical three-dimensional nonlinear photonic crystal for annular beam generation Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-18 Ruonan Wang, Qiang Cao, Xiaoliang Wang, Fengchang Li
We present a hollow cylindrical three-dimensional nonlinear photonic crystal for annular beam shaping. By inducing a modification with the near-infrared femtosecond laser inside lithium niobate, we experimentally achieve second-order nonlinear optical coefficient modulation in three dimensions. The center dark spot ratio of the generated annular beam can be adjusted by varying the hollow ratio of the
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Magnetic heating of interacting nanoparticles under different driving field waveforms Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-18 J. Ortega-Julia, D. Ortega, J. Leliaert
This study explores the impact of different magnetic driving field waveforms on nanoparticle heating in magnetic hyperthermia. Our research, which shifts the usual focus from individual nanoparticle properties to interacting particle clusters, evidences that square waves induce more uniform and greater heating than sinusoidal waves. The sequential switching observed with sinusoidal waves, which additionally
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Impact of Al profile in high-Al content AlGaN/GaN HEMTs on the 2DEG properties Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-18 A. Papamichail, A. R. Persson, S. Richter, V. Stanishev, N. Armakavicius, P. Kühne, S. Guo, P. O. Å. Persson, P. P. Paskov, N. Rorsman, V. Darakchieva
Ultra-thin high-Al content barrier layers can enable improved gate control and high-frequency operation of AlGaN/GaN high electron mobility transistors (HEMTs) but the precise composition control is very challenging. In this work, we investigate the compositional profiles of AlxGa1−xN/GaN HEMT structures with targeted Al content in the barrier layer, x = 0.50, 0.70, and 1, and thickness in the sub-10
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Highly tunable skyrmion-like polar nanodomains for high-density ferroelectric hard disks Appl. Phys. Rev. (IF 11.9) Pub Date : 2024-09-17 Hongying Chen, Wenda Yang, Cheng Li, Peijie Jiao, Zhiyu Liu, Chuanjie Lin, Yaoyao Chen, Guo Tian, Yu Deng, Yuefeng Nie, Yongjun Wu, Jun-Ming Liu, Zijian Hong, Xingsen Gao, Di Wu
Emerging topological polar domains have a wide range of potential applications in electronic devices. It is critical to accurately manipulate these topological domains by electrical fields and explore their exotic properties for making more energy-efficient high-density non-volatile memories. Herein, we demonstrate that skyrmion-like polar nanodomains appear at room temperature in SrTiO3/PbTiO3 bilayer
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Energy storage chemistry: Atomic and electronic fundamental understanding insights for high-performance supercapacitors Appl. Phys. Rev. (IF 11.9) Pub Date : 2024-09-17 Thanigai Arul Kumaravelu, Ramana Ramya Jayapalan, Han-Wei Chang, Asokan Kandasami, Lionel Vayssieres, Chung-Li Dong
The scarcity of fuels, high pollution levels, climate change, and other major environmental issues are critical challenges that modern societies are facing, mostly originating from fossil fuels-based economies. These challenges can be addressed by developing green, eco-friendly, inexpensive energy sources and energy storage devices. Electrochemical energy storage materials possess high capacitance
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Swift heavy ion irradiation-induced enhancement of spin–orbit torque efficiency in Pt/Co/Ta trilayers Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-17 Jianrong Zhang, Yuzhi Li, Xiaodong He, Qi Zhang, Ze Yan, Yuhan Chang, Baoshan Cui, Yalu Zuo, Yan-bin Sheng, Li Xi
Increasing the efficiency of spin–orbit torque (SOT) is of great interest in applications for magnetic random access memory and logic devices due to decreased energy consumption. Here, we present that the SOT efficiency of Pt/Co/Ta films with perpendicular magnetic anisotropy can be improved by swift high-energy heavy Fe11+ ion irradiation, which is an effective method to alter crystallinity, interface
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Statistical features of the response of a superconducting hot-electron bolometer to extremely weak terahertz pulses of picosecond and nanosecond duration Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-17 T. I. Novikova, K. A. Kuznetsov, I. V. Korolev, I. V. Pentin, P. A. Prudkovskii, G. Kh. Kitaeva
We study the statistical distributions of the output signals of a superconducting hot-electron bolometer (HEB) detector exposed to weak photon pulses of 1 THz (terahertz) frequency. Pulses with variable photon numbers were generated through strongly non-degenerate parametric downconversion (PDC) in a LiNbO3 crystal at 4.8 K. Fundamental differences in histograms are found between two PDC pumping modes
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High-quality Ge/SiGe heterostructure with atomically sharp interface grown by molecular beam epitaxy Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-17 Jie-yin Zhang, Ming Ming, Jian-huan Wang, Ding-ming Huang, Han Gao, Yi-xin Chu, Bin-xiao Fu, H. Q. Xu, Jian-jun Zhang
Germanium is a versatile material for realization of spin and topological quantum computing. Here, we report on the epitaxial growth of an undoped Ge/SiGe heterostructure in which a hole quantum well is formed in the sandwiched Ge layer. The heterostructure is grown on Si (001) via molecular beam epitaxy (MBE). Atomic force microscopy characterizations display a flat surface with a root mean square
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Charge carrier absorption in n-type Sb2Se3 Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-17 F. Herklotz, E. V. Lavrov, T. D. C. Hobson, J. D. Major, K. Durose
The optical and electrical properties of n-type chlorine-doped Sb2Se3 single crystals, with free carrier concentrations above 1016 cm−3 at room temperature, have been studied. The experiments reveal a strongly polarized temperature-dependent long-wavelength infrared absorption attributable to conduction band electrons within the material. For wavelengths between 1.6 and 6 μm, the room temperature absorption
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Compact widely tunable laser integrated on an indium phosphide membrane platform Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-17 Tasfia Kabir, Yi Wang, Stefano Tondini, Kevin Williams, Yuqing Jiao, Martijn J. R. Heck
We present the design, fabrication, and characterization results of a compact, widely tunable laser realized on an indium phosphide membrane-on-silicon (IMOS) platform. The laser features a compact Mach–Zehnder interferometric structure as the wavelength-selective intracavity filter with a footprint of 0.13 mm2. The filter design is optimized to ensure narrow filter transmission and high side-mode-to-main-mode-ratio
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300-nm-thick, ultralow-loss silicon nitride photonic integrated circuits by 8-in. foundry production Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-17 Xuguang Zhang, Yuxin Liang, Yujun Chen, Bitao Shen, Jiahui Huang, Chenghao Lao, Yichen Wu, Zhihui Li, Dapeng Liu, Haowen Shu, Weiwei Hu, Xingjun Wang, Naidi Cui, Lin Chang
Silicon nitride (Si3N4) photonic integrated circuits are rapidly developing in recent decades. The low loss of Si3N4 attracts significant attention and facilitates a wide range of applications in integrated photonics. In this work, we demonstrate the foundry fabrication of a 300-nm-thick 8-in. wafer-scale Si3N4 platform, with a microresonator intrinsic quality factor of up to 15×106, corresponding
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ScAlInN/GaN heterostructures grown by molecular beam epitaxy Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-17 Haotian Ye, Rui Wang, Liuyun Yang, Jinlin Wang, Tao Wang, Ran Feng, Xifan Xu, Wonseok Lee, Ping Wang, Xinqiang Wang
Rare-earth (RE) elements doped III-nitride semiconductors have garnered attention for their potential in advanced high-frequency and high-power electronic applications. We report on the molecular beam epitaxy of quaternary alloy ScAlInN, which is an encouraging strategy to improve the heterointerface quality when grown at relatively low temperatures. Monocrystalline wurtzite phase and uniform domain
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Non-Foster approach to broadband optical metamaterials based on Lorentzian gain materials Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-17 Silvio Hrabar, Richard W. Ziolkowski
All passive metamaterials are inherently narrowband due to fundamental dispersion-energy constraints, and their dispersive properties are usually approximated by a Lorentz model. However, there are broadband active metamaterials in the radio frequency (RF) regime based on negative capacitors with non-Foster dispersion properties. Non-Foster dispersion is usually considered as an “electronic-engineering
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Surface thermomigration of 2D voids Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-17 Stefano Curiotto, Nicolas Combe, Pierre Müller, Ali El Barraj, Nayef Abu Dahech, Fabien Cheynis, Olivier Pierre-Louis, Frédéric Leroy
In a thermal gradient, surface nanostructures have been experimentally observed to move due to thermomigration. However, analytical models that describe the thermomigration force acting on surfaces are still controversial. In this work, we start from a thermodynamic approach based on the Massieu function, which is used to describe thermomigration of single adatoms, to develop an expression for the
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Spin filtering and quantum transport with transition metal-doped hydrogenated silicon quantum dot Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-17 Hemant Arora, Arup Samanta
Spin filtering is a fundamental operation in spintronics, enabling the generation and detection of spin-polarized carriers. Here, we proposed and theoretically demonstrated that a 3d transition metal (TM) doped hydrogenated silicon quantum dot (TM:H-SiQD) is a suitable candidate for spin-filter devices. Using density functional theory, we investigate the structure, electronic properties, and magnetic
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Above-room-temperature intrinsic ferromagnetism in ultrathin van der Waals crystal Fe3+xGaTe2 Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-17 Gaojie Zhang, Jie Yu, Hao Wu, Li Yang, Wen Jin, Bichen Xiao, Wenfeng Zhang, Haixin Chang
Two-dimensional (2D) van der Waals (vdW) magnets are crucial for ultra-compact spintronics. However, so far, no vdW crystal has exhibited tunable above-room-temperature intrinsic ferromagnetism in the 2D ultrathin regime. Here, we report the tunable above-room-temperature intrinsic ferromagnetism in ultrathin vdW crystal Fe3+xGaTe2 (x = 0 and 0.3). By increasing the Fe content, the Curie temperature
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Topological photonic quasicrystal alloy Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-17 Ziyao Wang, Xiang Xi, Zhen Gao
Recently, a concept of topological photonic alloy was proposed by mixing magnetized and non-magnetized gyromagnetic rods in a two-dimensional square photonic crystal that supports tunable Chern bandgaps and robust chiral edge states even at a low concentration of magnetized rods. However, whether such a notion can be extended to non-crystalline systems is still an open question. Here, we theoretically
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Ferrimagnetic second-order topological insulator with valley polarization in two-dimensional magnet Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-17 Xin-yu Liu, Wei-xiao Ji, Meng Ding, Sheng-shi Li, Chang-wen Zhang
Two-dimensional (2D) ferromagnetic and antiferromagnetic second-order topological insulators (SOTIs) coexisting with valley polarization have received increasing attention recently, while 2D valley-polarized ferrimagnetic (ferri-valley) SOTI has not been reported yet. In this work, we propose an effective six-band tight-binding model based on structural symmetry to confirm the possibility of coexistence
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Resource-efficient photonic quantum computation with high-dimensional cluster states Nat. Photon. (IF 32.3) Pub Date : 2024-09-16 Ohad Lib, Yaron Bromberg
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Experimental preparation of multiphoton-added coherent states of light npj Quantum Inform. (IF 6.6) Pub Date : 2024-09-14 Jiří Fadrný, Michal Neset, Martin Bielak, Miroslav Ježek, Jan Bílek, Jaromír Fiurášek
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Demonstration of quantum network protocols over a 14-km urban fiber link npj Quantum Inform. (IF 6.6) Pub Date : 2024-09-14 Stephan Kucera, Christian Haen, Elena Arenskötter, Tobias Bauer, Jonas Meiers, Marlon Schäfer, Ross Boland, Milad Yahyapour, Maurice Lessing, Ronald Holzwarth, Christoph Becher, Jürgen Eschner
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An extremely bad-cavity laser npj Quantum Inform. (IF 6.6) Pub Date : 2024-09-13 Jia Zhang, Tiantian Shi, Jianxiang Miao, Deshui Yu, Jingbiao Chen
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Applications of surface enhanced Raman scattering (SERS) spectroscopy for detection of nucleic acids Nanophotonics (IF 6.5) Pub Date : 2024-09-14 Aleksandra Michałowska, Andrzej Kudelski
Nucleic acids (deoxyribonucleic acid – DNA and ribonucleic acid – RNA) are essential components of all living organisms, with DNA encoding genetic information and RNA facilitating vital biological processes. The detection of nucleic acids having a specific sequence is crucial for identifying organisms and diagnosing genetic diseases. Because surface-enhanced Raman spectroscopy (SERS) is considered
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Large-scale simulations of Floquet physics on near-term quantum computers npj Quantum Inform. (IF 6.6) Pub Date : 2024-09-13 Timo Eckstein, Refik Mansuroglu, Piotr Czarnik, Jian-Xin Zhu, Michael J. Hartmann, Lukasz Cincio, Andrew T. Sornborger, Zoë Holmes
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Polarization-entangled photons from a whispering gallery resonator npj Quantum Inform. (IF 6.6) Pub Date : 2024-09-13 Sheng-Hsuan Huang, Thomas Dirmeier, Golnoush Shafiee, Kaisa Laiho, Dmitry V. Strekalov, Gerd Leuchs, Christoph Marquardt
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Quantum autoencoders using mixed reference states npj Quantum Inform. (IF 6.6) Pub Date : 2024-09-13 Hailan Ma, Gary J. Mooney, Ian R. Petersen, Lloyd C. L. Hollenberg, Daoyi Dong
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High-brightness transition metal-sensitized lanthanide near-infrared luminescent nanoparticles Nat. Photon. (IF 32.3) Pub Date : 2024-09-13 Jiang Ming, Ying Chen, Han Miao, Yong Fan, Shangfeng Wang, Zihan Chen, Zhenhao Guo, Zhixiu Guo, Luyin Qi, Xusheng Wang, Baofeng Yun, Peng Pei, Haisheng He, Hongxin Zhang, Yun Tang, Dongyuan Zhao, Gary Ka-Leung Wong, Jean-Claude G. Bünzli, Fan Zhang
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Positive-feedback organic light-emitting diodes and upconverters Nat. Photon. (IF 32.3) Pub Date : 2024-09-13 Raju Lampande, Jon-Paul S. DesOrmeaux, Adrian Pizano, Jonathon R. Schrecengost, Robert Cawthorn, Hunter Bowman, Alex Grede, Urcan Guler, John W. Hamer, Noel C. Giebink
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Brillouin laser-driven terahertz oscillator up to 3 THz with femtosecond-level timing jitter Nat. Photon. (IF 32.3) Pub Date : 2024-09-13 Brendan M. Heffernan, James Greenberg, Takashi Hori, Tatsuya Tanigawa, Antoine Rolland
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Carrier cooling in direct bandgap hexagonal silicon-germanium nanowires Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-13 M. F. Schouten, M. A. J. van Tilburg, V. T. van Lange, W. H. J. Peeters, R. Farina, M. M. Jansen, M. Vettori, E. P. A. M. Bakkers, J. E. M. Haverkort
Direct bandgap group IV semiconductors, like strained Ge, GeSn, or hexagonal SiGe, are considered promising for photonic integration on silicon. For group IV semiconductor lasers, it is crucial to understand the carrier cooling efficiency toward the band edges. From a fundamental perspective, a study of carrier cooling within the Γ-valley of direct bandgap group IV semiconductors is particularly interesting
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Quantitative determination of twist angle and strain in Van der Waals moiré superlattices Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-13 Steven J. Tran, Jan-Lucas Uslu, Mihir Pendharkar, Joe Finney, Aaron L. Sharpe, Marisa Hocking, Nathan J. Bittner, Kenji Watanabe, Takashi Taniguchi, Marc A. Kastner, Andrew J. Mannix, David Goldhaber-Gordon
Scanning probe techniques are popular, nondestructive ways to visualize the real space structure of Van der Waals moirés. The high lateral spatial resolution provided by these techniques enables extracting the moiré lattice vectors from a scanning probe image. We have found that the extracted values, while precise, are not necessarily accurate. Scan-to-scan variations in the behavior of the piezos
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Dual-comb spectroscopy over a 100 km open-air path Nat. Photon. (IF 32.3) Pub Date : 2024-09-12 Jin-Jian Han, Wei Zhong, Ruo-Can Zhao, Ting Zeng, Min Li, Jian Lu, Xin-Xin Peng, Xi-Ping Shi, Qin Yin, Yong Wang, Ali Esamdin, Qi Shen, Jian-Yu Guan, Lei Hou, Ji-Gang Ren, Jian-Jun Jia, Yu Wang, Hai-Feng Jiang, Xiang-Hui Xue, Qiang Zhang, Xian-Kang Dou, Jian-Wei Pan
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Heisenberg-limited Hamiltonian learning for interacting bosons npj Quantum Inform. (IF 6.6) Pub Date : 2024-09-11 Haoya Li, Yu Tong, Tuvia Gefen, Hongkang Ni, Lexing Ying
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Ultra-stable gold nanoparticles based on N-heterocyclic carbene interfacial compound Appl. Phys. Rev. (IF 11.9) Pub Date : 2024-09-11 Kyung Ho Kim, Yejin Kim, Sung Eun Seo, Chul Soon Park, Jinyoung Kim, Yu Kyung Kim, Hyoung-il Kim, Yoo Min Park, Oh Seok Kwon
Interfacial chemicals for metal surface functionalization were developed for applications of high water dispersibility and environmental stability. Metal nanomaterials, i.e., gold nanoparticles (AuNPs), were synthesized by introducing various interfacial chemicals, to improve the hydrophilicity of biosensors, such as those used in fluorescence resonance energy transfer (FRET) and lateral flow assay
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The role of gallium nitride in the evolution of electric vehicles: Energy applications, technology, and challenges Appl. Phys. Rev. (IF 11.9) Pub Date : 2024-09-11 Kazi Faridur Rahman, Shaili Falina, Mohamed Fauzi Packeer Mohamed, Hiroshi Kawarada, Mohd Syamsul
It is only recently that the electric vehicle (EV) has evolved into a contemporary invention. There has been a rapid acceleration in the development of EVs in a number of nations in order to lessen their reliance on oil and their contribution to environmental pollution. In the tangible world, fully EVs do not release any carbon dioxide (CO2) emissions from their tailpipes, unlike any other conventional
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Effects of residual oxygen on superconducting niobium films Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-11 Miguel Manzo-Perez, Moeid Jamalzadeh, Zhujun Huang, Xiao Tong, Kim Kisslinger, Dmytro Nykypanchuk, Davood Shahrjerdi
The integration of niobium (Nb) into emerging superconducting circuits can enhance their performance and function. However, growth of high purity Nb can be challenging due to its high reactivity with oxygen. Here, we examine the role of residual oxygen inside the growth chamber in transforming the structural, chemical, and superconducting properties of Nb films. We demonstrate that an increase in unintentional
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Versatile hybrid optical waveguides in amorphous silicon carbide with enhanced functionality and performance Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-11 Mohammad Talebi Khoshmehr, Mahdi Mozdoor Dashtabi, Hamed Nikbakht, Bruno Lopez Rodriguez, Naresh Sharma, Iman Esmaeil Zadeh, Bob van Someren, B. Imran Akca
In most optical waveguides employed within photonic integrated circuits, light confinement is achieved by etching the high-index layer. However, these waveguides often lack versatility in optimizing optical properties, such as mode size, shape, dispersion, and polarization. Moreover, they frequently suffer from high coupling losses and their propagation losses are significantly influenced by the quality
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Macrospin study on magnetization reversal in synthetic antiferromagnetically coupled composite of perpendicularly magnetized nanomagnets Appl. Phys. Lett. (IF 3.5) Pub Date : 2024-09-11 Toshiki Yamaji, Hiroshi Imamura
Magnetization reversal in a synthetic antiferromagnetically coupled composite of perpendicularly magnetized nanomagnets is theoretically explored based on the macrospin model. The analytical expressions of magnetization reversal are derived. The analytical results are confirmed by the results of the Landau–Lifshitz–Gilbert simulation. Furthermore, we find that a critical antiferromagnetic coupling