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Acoustics-based techniques are investigated to focus and bunch nanoparticle beams. This allows to overcome the prominent problem of the longitudinal and transverse mismatch of particle stream and x-ray beam in single-particle/single…

应用物理 · 物理学 2019-06-19 Zheng Li , Liangliang Shi , Lushuai Cao , Zhengyou Liu , Jochen Küpper

A time-resolved observation of coherent interlayer longitudinal acoustic phonons in 2$H$-MoSe$_2$ is reported. A femtosecond pump-probe technique is used to investigate the evolution of the energy loss of these vibrational modes in a wide…

介观与纳米尺度物理 · 物理学 2019-07-11 P. Soubelet , A. A. Reynoso , A. Fainstein , K. Nogajewski , M. Potemski , C. Faugeras , A. E. Bruchhausen

Experimental auto- and cross-correlation functions and their corresponding spectral density functions are extracted from measured sweep data of mode-stirred fields. These are compared with theoretical models derived in part I, using…

经典物理 · 物理学 2024-04-05 Luk R. Arnaut , John M. Ladbury

We adjust the transient dynamics of a piezo-actuated bimorph Atomic Force Microscopy (AFM) probe using a state feedback controller. This approach enables us to adjust the quality factor and the resonance frequency of the probe…

原子物理 · 物理学 2012-04-16 Bilal Orun , Serkan Necipoglu , Cagatay Basdogan , Levent Guvenc

The decomposition of hydrodynamic and acoustic components of cavity flows can aid the understanding of the flow-acoustic interaction, which produces a variety of adverse effects in applications. We apply the approach of combining the…

流体动力学 · 物理学 2021-05-19 Qiong Liu , Datta Gaitonde

The electrical generation and detection of elastic waves are the foundation for acousto-electronic and acousto-optic systems. For surface-acoustic-wave devices, micro-/nano-electromechanical systems, and phononic crystals, tailoring the…

介观与纳米尺度物理 · 物理学 2018-05-14 Lu Zheng , Hui Dong , Xiaoyu Wu , Yen-Lin Huang , Wenbo Wang , Weida Wu , Zheng Wang , Keji Lai

Discharge source is considered as modifier of flow hydrodynamic spectrum. Characteristic frequency of nonlinear spectrum and spectrum power were determined under conditions of arc sliding discharge in supersonic flow. Two stages of…

混沌动力学 · 物理学 2014-01-27 Sergey Kamenshchikov

In this experimental study, a flowing dielectric barrier discharge operating at atmospheric pressure is used for the splitting of CO2 into O2 and CO. The influence of the applied frequency and plasma power on the microdischarge properties…

等离子体物理 · 物理学 2016-05-02 Alp Ozkan , Thierry Dufour , Tiago Silva , Nikolay Britun , Rony Snyders , Annemie Bogaerts , François Reniers

We present a novel approach to transient Raman spectroscopy, which combines stochastic probe pulses and a covariance-based detection to measure stimulated Raman signals in alpha-quartz. A coherent broadband pump is used to simultaneously…

We propose here an experiment aimed to determine whether there are superconducting pairing fluctuations in the pseudogap regime of the high-$T_c$ materials. In the experimental setup, two samples above $T_c$ are brought into contact at a…

超导电性 · 物理学 2009-10-31 Ivar Martin , Alexander Balatsky

The time dependent master equation from the seminal article by Ragazzini, Randall and Russell [J. R. Ragazzini, R. H. Randall and F. A. Russell, "Analysis of Problems in Dynamics by Electronic Circuits", Proc. of the I.R.E., Vol. 35, pp.…

In quantum reading, a quantum state of light (transmitter) is applied to read classical information. In the presence of noise or for sufficiently weak signals, quantum reading can outperform classical reading by enhanced state…

量子物理 · 物理学 2015-01-22 Wojciech Roga , Daniela Buono , Fabrizio Illuminati

The emergence of "acoustic diode" (AD) capable of rectifying acoustic wave like electrical diodes do to electricity has been believed to be able to offer unconventional manipulation on sound, e.g., to isolate the wrong-way reflection, and…

经典物理 · 物理学 2015-06-04 Zhong-ming Gu , Jie Hu , Bin Liang , Xin-ye Zou , Jian-chun Cheng

A simulation of an atomic force microscope operating in the constant amplitude dynamic mode is described. The implementation mimics the electronics of a real setup including a digital phase-locked loop (PLL). The PLL is not only used as a…

原子与分子团簇 · 物理学 2007-05-23 Laurent Nony , Alexis Prof. Baratoff , Dominique Schaer , Oliver Pfeiffer , Adrian Wezel , Ernst Meyer

The use of a complex ferromagnetic system to manipulate GHz surface acoustic waves is a rich current topic under investigation, but the high-power nonlinear regime is under-explored. We introduce focused surface acoustic waves, which…

Combined free-stream disturbance measurements and receptivity studies in hypersonic wind tunnels were conducted by means of a slender wedge probe and direct numerical simulation. The study comprises comparative tunnel noise measurements at…

We describe here an experimental technique based on the acoustic scattering phenomenon allowing the direct probing of the vorticity field in a turbulent flow. Using time-frequency distributions, recently introduced in signal analysis…

chao-dyn · 物理学 2009-10-31 Christophe Baudet , Olivier Michel , William J. Williams

Photoacoustic image reconstruction often assumes that the restriction of the acoustic pressure on the detection surface is given. However, commonly used detectors often have a certain directivity and frequency dependence, in which case the…

数值分析 · 数学 2020-01-08 Gerhard Zangerl , Sunghwan Moon , Markus Haltmeier

The piezoelectric optomechanical devices supply a promising experimental platform to realize the coherent and effective control and measurement of optical circuits working in Terahertz (THz) frequencies via superconducting electron devices…

量子物理 · 物理学 2020-11-16 Quanzhen Ding , Peng Zhao , Yonghong Ma , Yusui Chen

In this paper, we conduct a cross-dataset study on parametric and non-parametric raw-waveform based speaker embeddings through speaker verification experiments. In general, we observe a more significant performance degradation of these…

音频与语音处理 · 电气工程与系统科学 2021-10-13 Ge Zhu , Frank Cwitkowitz , Zhiyao Duan
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