Theory, Observation, and Ultrafast Response of the Hybrid Anapole Regime in Light Scattering,Laser & Photonics Reviews

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Theory, Observation, and Ultrafast Response of the Hybrid Anapole Regime in Light Scattering
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2021-08-02 , DOI: 10.1002/lpor.202100114
Adrià Canós Valero ₁ , Egor A. Gurvitz ₁ , Fedor A. Benimetskiy ₁ , Dmitry A. Pidgayko ₁ , Anton Samusev ₁ , Andrey B. Evlyukhin _{1,

2} , Vjaceslavs Bobrovs ₃ , Dmitrii Redka _{3,

4} , Michael I. Tribelsky _{5,

6,

7} , Mohsen Rahmani ₈ , Khosro Zangeneh Kamali ₉ , Alexander A. Pavlov ₁₀ , Andrey E. Miroshnichenko ₁₁ , Alexander S. Shalin _{1,

3,

12}

Affiliation

ITMO University Kronverksky prospect 49 St. Petersburg 197101 Russia
Institute of Quantum Optics Leibniz Universität Hannover Welfengarten Street 1 Hannover 30167 Germany
Institute of Telecommunications, Riga Technical University Azenes street 12 Riga 1048 Latvia
Electrotechnical University “LETI” (ETU) 5 Prof. Popova Street Saint Petersburg 197376 Russia
Faculty of Physics M. V. Lomonosov Moscow State University Moscow 119991 Russia
Moscow Engineering Physics Institute National Research Nuclear University Moscow 115409 Russia
School of Physical Science and Technology and Jiangsu Key Laboratory of Thin Film Soochow University Suzhou 215006 China
Advanced Optics and Photonics Laboratory Department of Engineering School of Science and Technology Nottingham Trent University Nottingham NG11 8NS UK
1ARC Centre of Excellence for Transformative Meta‐Optical Systems Research School of Physics The Australian National University Canberra ACT 2601 Australia
Institute of Nanotechnology of Microelectronics of the Russian Academy of Sciences (INME RAS) Nagatinskaya street, house 16A, building 11 Moscow 115487 Russia
School of Engineering and Information Technology UNSW Canberra Canberra ACT 2600 Australia
Kotel'nikov Institute of Radio Engineering and Electronics of Russian Academy of Sciences (Ulyanovsk branch) Goncharova Str.48 Ulyanovsk 432000 Russia

Modern nanophotonics has witnessed the rise of “electric anapoles” (EDAs), destructive interferences of electric and toroidal electric dipoles, actively exploited to resonantly decrease radiation from nanoresonators. However, the inherent duality in Maxwell equations suggests the intriguing possibility of “magnetic anapoles,” involving a nonradiating composition of a magnetic dipole and a magnetic toroidal dipole. Here, a hybrid anapole (HA) of mixed electric and magnetic character is predicted and observed experimentally via dark field spectroscopy, with all the dominant multipoles being suppressed by the toroidal terms in a nanocylinder. Breaking the spherical symmetry allows to overlap up to four anapoles stemming from different multipoles with just two tuning parameters. This effect is due to a symmetry-allowed connection between the resonator multipolar response and its eigenstates. The authors delve into the physics of such current configurations in the stationary and transient regimes and explore new ultrafast phenomena arising at sub-picosecond timescales, associated with the HA dynamics. The theoretical results allow the design of non-Huygens metasurfaces featuring a dual functionality: perfect transparency in the stationary regime and controllable ultrashort pulse beatings in the transient. Besides offering significant advantages with respect to EDAs, HAs can play an essential role in developing the emerging field of ultrafast resonant phenomena.

中文翻译：

光散射中混合 Anapole 体制的理论、观察和超快响应

现代纳米光子学见证了“电偶极子”（EDA）的兴起，即电偶极子和环形电偶极子的相消干涉，被积极利用以共振减少来自纳米谐振器的辐射。然而，麦克斯韦方程中固有的二元性暗示了“磁反极”的有趣可能性，包括磁偶极子和磁环形偶极子的非辐射组合。在这里，通过暗场光谱实验预测和观察到具有混合电和磁特性的混合 anapole (HA)，所有主要的多极子都被纳米圆柱中的环形项抑制。打破球对称性允许重叠来自不同多极的多达四个 anapole，只需两个调谐参数。这种效应是由于谐振器多极响应与其本征态之间允许对称连接。作者深入研究了静态和瞬态状态下此类电流配置的物理学，并探索了与 HA 动力学相关的亚皮秒时间尺度上出现的新超快现象。理论结果允许设计具有双重功能的非惠更斯超表面：静止状态下的完美透明度和瞬态中的可控超短脉冲跳动。除了在 EDA 方面提供显着优势外，HA 还可以在发展超快共振现象的新兴领域中发挥重要作用。作者深入研究了静态和瞬态状态下此类电流配置的物理学，并探索了与 HA 动力学相关的亚皮秒时间尺度上出现的新超快现象。理论结果允许设计具有双重功能的非惠更斯超表面：静止状态下的完美透明度和瞬态中的可控超短脉冲跳动。除了在 EDA 方面提供显着优势外，HA 还可以在发展超快共振现象的新兴领域中发挥重要作用。作者深入研究了静态和瞬态状态下此类电流配置的物理学，并探索了与 HA 动力学相关的亚皮秒时间尺度上出现的新超快现象。理论结果允许设计具有双重功能的非惠更斯超表面：静止状态下的完美透明度和瞬态中的可控超短脉冲跳动。除了在 EDA 方面提供显着优势外，HA 还可以在发展超快共振现象的新兴领域中发挥重要作用。静止状态下的完美透明度和瞬态中可控的超短脉冲跳动。除了在 EDA 方面提供显着优势外，HA 还可以在发展超快共振现象的新兴领域中发挥重要作用。静止状态下的完美透明度和瞬态中可控的超短脉冲跳动。除了在 EDA 方面提供显着优势外，HA 还可以在发展超快共振现象的新兴领域中发挥重要作用。

更新日期：2021-08-02

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