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We tackle a challenging task: multi-view and multi-modal event detection that detects events in a wide-range real environment by utilizing data from distributed cameras and microphones and their weak labels. In this task, distributed…

Audio and Speech Processing · Electrical Eng. & Systems 2022-02-21 Masahiro Yasuda , Yasunori Ohishi , Shoichiro Saito , Noboru Harada

Sub-nanometer displacement detection lays the solid foundation for critical applications in modern metrology. In-plane displacement sensing, however, is mainly dominated by the detection of differential photocurrent signals from…

Applied Physics · Physics 2020-04-23 Miao-Hsuan Chien , Johannes Steurer , Pedram Sadeghi , Nicolas Cazier , Silvan Schmid

Radio-frequency reflectometry of nanodevices requires careful separation of signal quadratures to distinguish dissipative and dispersive contributions to the device impedance. A tunable phase shifter for this purpose is described and…

Instrumentation and Detectors · Physics 2014-12-16 G. Yin , G. A. D. Briggs , E. A. Laird

We describe a transducer for low-temperature atomic force microscopy based on electromechanical coupling due to a strain-dependent kinetic inductance of a superconducting nanowire. The force sensor is a bending triangular plate (cantilever)…

Applied Physics · Physics 2024-02-16 August K. Roos , Ermes Scarano , Elisabet K. Arvidsson , Erik Holmgren , David B. Haviland

An opto--electro--mechanical system formed by a nanomembrane capacitively coupled to an LC resonator and to an optical interferometer has been recently employed for the high--sensitive optical readout of radio frequency (RF) signals [T.…

Quantum Physics · Physics 2018-04-04 I. Moaddel Haghighi , N. Malossi , R. Natali , G. Di Giuseppe , D. Vitali

We demonstrate autoparametric excitation of two distinct sub-harmonic mechanical modes by the same driven mechanical mode corresponding to different drive frequencies within its resonance dispersion band. This experimental observation is…

Pattern Formation and Solitons · Physics 2017-10-11 Adarsh Ganesan , Cuong Do , Ashwin Seshia

Three-dimensional elements, with refractive index distribution structured at sub-wavelength scale, provide an expansive optical design space that can be harnessed for demonstrating multi-functional free-space optical devices. Here we…

We present a method for efficient spectral readout of mechanical resonator arrays in dissipative environments. Magnetomotive drive and detection is used to drive double clamped resonators in the nonlinear regime. Resonators with almost…

Instrumentation and Detectors · Physics 2009-08-25 W. J. Venstra , H. S. J. van der Zant

We study a novel configuration for displacement detection consisting of a nanomechanical resonator coupled to both, a radio frequency superconducting interference device (RF SQUID) and to a superconducting stripline resonator. We employ an…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 Eyal Buks , Stav Zaitsev , Eran Segev , Baleegh Abdo , M. P. Blencowe

Topology-linked binary degrees of freedom of guided waves have been used to expand the channel capacity of and to ensure robust transmission through photonic waveguides. However, selectively exciting optical modes associated with the…

Optics · Physics 2022-06-15 Yandong Li , Yang Yu , Kueifu Lai , Yuchen Han , Fei Gao , Baile Zhang , Gennady Shvets

Coupling a microscopic mechanical resonator to a nano-scale quantum system enables control of the mechanical resonator via the quantum system, and vice versa. The coupling is usually achieved through functionalization of the mechanical…

We show that for the optimized angle of incidence, the SPR based optical sensors exhibit dual resonance in the near-infrared region around which the sensor becomes exceptionally high sensitive. Both the resonances show opposite spectral…

Optics · Physics 2020-07-07 Indrajeet Kumar , Ranjeet Dwivedi , Saurabh Mani Tripathi

The extensive research and development of micromechanical resonators is trying to allow the use of these devices for highly sensitive applications. Microcantilevers are some of the simplest MEMS structure and had been proved to be a good…

Other Computer Science · Computer Science 2008-02-22 M. Narducci , E. Figueras , I. Gracia , L. Fonseca , J. Santander , C. Cané

We present here the MsSpec Dielectric Function module (MsSpec-DFM), which generates dielectric functions in an electron gas or a liquid, either isolated or embedded into an environment. In addition to standard models such as the plasmon…

Other Condensed Matter · Physics 2022-07-21 Aditi Mandal , Sylvain Tricot , Rakesh Choubisa , Didier Sebilleau

A refractive index sensor based on a semicircular bent fiber is presented. The interference occurs between the cladding mode excited in the bending region and the core mode. Both the theoretical and experimental results show that the…

Applied Physics · Physics 2018-02-07 Tingting Wu , Linlin Xu , Xinhai Zhang

Soft robots could bring robotic systems to new horizons, by enabling safe human-machine interaction. For precise control, these soft structures require high level position feedback that is not easily achieved through conventional…

In nanomechanical photothermal absorption spectroscopy and microscopy, the measured substance becomes a part of the detection system itself, inducing a nanomechanical resonance frequency shift upon thermal relaxation. Suspended,…

Instrumentation and Detectors · Physics 2023-06-30 Robert G. West , Kostas Kanellopulos , Silvan Schmid

All-dielectric, sub-micrometric particles have been successfully exploited for light management in a plethora of applications at visible and near-infrared frequency. However, the investigation of the intricacies of the Mie resonances at the…

This paper reports result of calculation and experimental realization of an electromechanical system that consists of a high-Q mechanical oscillator parametrically coupled in the manner of a capacitive transducer with a RF circuit, which is…

Instrumentation and Detectors · Physics 2016-03-09 A. V. Dmitriev , V. P. Mitrofanov

We demonstrate a hybrid distributed fiber sensing system for multi-parameter detection. The integration of phase-sensitive optical time domain reflectometry ({\Phi}-OTDR) and Brillouin optical time domain reflectometry (B-OTDR) enables…

Optics · Physics 2016-09-02 Jingdong Zhang , Tao Zhu , Huan Zhou , Yang Li , Min Liu , Wei Huang
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