DOI:https://doi.org/10.1103/PhysRevApplied.13.069902

We present amplitude and phase characterization of short optical pulses using dual comb spectroscopy, where one comb is a well characterized stable frequency comb and the second is the pulse source to be measured. We demonstrated that the technique is suitable for truly arbitrary repetition rates of the two combs. Moreover, the system is highly sensitive and was shown to enable measurements of low

The navigation of micro-robots in complex flow environments is controlled by rheotaxis, the reorientation with respect to flow gradients. Here we demonstrate how payloads can be exploited to enhance the motion against flows. Using fully resolved hydrodynamic simulations, the mechanisms are revealed that allow micro-robots of different shapes to reorient upstream. We find that cargo pullers are the

The presence of trap states plays an important role in the performance of opto-electronic devices. In the present investigation, charge carrier dynamics of newly synthesized amorphous and crystalline In$ {2} Se {3} $ thin films have been carried out using broad band femtosecond pump-probe spectroscopy in the temperature range of 5-300 K. Amorphous In$ {2} Se {3} $ thin films (thickness $ $300 nm) have

Recent research on nano-oscillators has shown the possibility of using coupled oscillator network as a core computing primitive for non-Boolean computation. The spin-torque oscillator (STO) is an attractive candidate because it is CMOS compatible, highly integrable, scalable, and frequency/phase tunable. Based on these promising features, we propose a new coupled-oscillator based architecture for hybrid

We demonstrate the local control of up to eight two-level systems interacting strongly with a microwave cavity. Following calibration, the frequency of each individual two-level system (qubit) is tunable without influencing the others. Bringing the qubits one by one on resonance with the cavity, we observe the collective coupling strength of the qubit ensemble. The splitting scales up with the square

A general concept is presented for increasing the in-slice spatial resolution in computed tomography in a flexible manner, and with relatively large source focal spots and detector pixels. The flexibility is a result of probing the sample by an array of thin beamlets shaped by a mask. Provided that the mask apertures are smaller than the combined blur of the x-ray source and detector, and that no significant

We report an} experimental study on the early detection of cascade flutter in a model aircraft turbine using a methodology that combines complex networks and synchronization. The network topology constructed from the determinism in cross recurrence plot allows us to extract the primary hubs during a transition to cascade flutter. The node strength in the network topology and the synchronization parameter

The performances of many spintronics devices are governed by the damping constant and magnetic anisotropies of constituent materials. The spin-orbit coupling (SOC) has been found to play a key role and is at the origins of these material parameters. Electric field control of latter parameter is in high demand for developing energy efficient nanoscale spintronics devices. Although, electric field control

Magnetic tunnel junctions (MTJ) is a key technology in modern spintronics because it is the basis of read-heads of modern hard disk drives, non-volatile magnetic random access memories, and sensor application. In this paper, we demonstrate that the tunneling magneto-resistance (TMR) can influence terahertz (THz) wave propagation through a MTJ. In particular, various magnetic configurations between

Measurement-based feedback control is central in quantum computing and precise quantum control. Here we realize a fast and flexible field-programmable-gate-array-based feedback control in a superconducting Xmon qubit system. The latency of room-temperature electronics is custom optimized to be as short as 140 ns. Projective measurement of a signal qubit produces a feedback tag to actuate a conditional

We report a classical molecular dynamics simulation of silicon nanoparticle and bulk models, both in crystalline and amorphous phases, to investigate their vibrational properties. By using a dynamical matrix approach and bond-polarizability model, together with the Raman decomposition approach [Phys. Rev. B 100, 134309 (2019)], we present a comprehensive analysis of vibrational spectra. In particular

We show that the light shift in atomic clocks can be suppressed using time variation of the interrogation field intensity. By measuring the clock output at two intensity levels, error signals can be generated that simultaneously stabilize a local oscillator to an atomic transition and correct for the shift of this transition caused by the interrogating optical field. These methods are suitable for

We demonstrate voltage-tunable thermo-optic bi- and tri-stability in silicon photonic microring resonators with lateral p-i-n junctions and present a technique for characterizing the thermo-optic transient response of integrated optical resonators. Our method for thermo-optic transient response measurement is applicable to any integrated photonics platform and uses standard equipment. Thermo-optic

The nitrogen-vacancy (NV) center defect in diamond enables local, optical detection of gigahertz frequency magnetic fields. NV detection of ferromagnetic resonance (FMR) relies on the scattering of the microwave driven uniform mode into magnons, a process that can result in NV-resonant magnetic field noise from magnons created by the scattering process. We use NV centers to detect ferromagnetic resonance