scholarly journals Near-field cavity optomechanical coupling in a compound semiconductor nanowire

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Motoki Asano ◽  
Guoqiang Zhang ◽  
Takehiko Tawara ◽  
Hiroshi Yamaguchi ◽  
Hajime Okamoto
Keyword(s):  
Near Field ◽  
Optical Cavity ◽  
Compound Semiconductor ◽  
Size Difference ◽  
Mechanical Motion ◽  
Cavity Optomechanics ◽  
Free Standing ◽  
Semiconductor Nanowire ◽  
Standing Structure ◽  
Optomechanical Coupling

AbstractA III-V compound semiconductor nanowire is an attractive material for a novel hybrid quantum interface that interconnects photons, electrons, and phonons through a wavelength-tunable quantum structure embedded in its free-standing structure. In such a nanomechanical element, however, a challenge is how to detect and manipulate a small number of phonons via its tiny mechanical motion. A solution would be to couple an optical cavity to a nanowire by introducing the ‘cavity optomechanics' framework, but the typical size difference between them becomes a barrier to achieving this. Here, we demonstrate near-field coupling of a silica microsphere cavity and an epitaxially grown InP/InAs free-standing nanowire. The evanescent optomechanical coupling enables not only fine probing of the nanowire’s mechanical motion by balanced homodyne interferometry but also tuning of the resonance frequency, linewidth, Duffing nonlinearity, and vibration axis in it. Combining this cavity optomechanics with epitaxial nanowire engineering opens the way to novel quantum metrology and information processing.

scholarly journals Near-field cavity optomechanical coupling in a compound semiconductor nanowire

2020 ◽  
Author(s):  
Motoki Asano ◽  
Guoqiang Zhang ◽  
Takehiko Tawara ◽  
Hiroshi Yamaguchi ◽  
Hajime Okamoto
Keyword(s):  
Near Field ◽  
Optical Cavity ◽  
Compound Semiconductor ◽  
Size Difference ◽  
Mechanical Motion ◽  
Cavity Optomechanics ◽  
Free Standing ◽  
Semiconductor Nanowire ◽  
Standing Structure ◽  
Optomechanical Coupling

Abstract A III-V compound semiconductor nanowire is an attractive material for a novel hybrid quantum interface that interconnects photons, electrons, and phonons through a wavelength-tunable quantum structure embedded in its free-standing structure. In such a nanomechanical element, however, a challenge is how to detect and manipulate a small number of phonons via its tiny mechanical motion. A solution would be to couple an optical cavity to a nanowire by introducing the "cavity optomechanics" framework, but the typical size difference between them becomes a barrier to achieving this. Here, we demonstrate near-field coupling of a silica microsphere cavity and an epitaxially grown InP/InAs free-standing nanowire. The evanescent optomechanical coupling enables not only fine probing of the mechanical motion by balanced homodyne interferometry but also tuning of the resonance frequency, linewidth, Duffing nonlinearity, and vibration axis in the nanowire. Combining this cavity optomechanics with epitaxial nanowire engineering opens the way to novel quantum metrology and information processing.

scholarly journals A Nanoscale Photonic Crystal Cavity Optomechanical System for Ultrasensitive Motion Sensing

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 462
Author(s):  
Ji Xia ◽  
Fuyin Wang ◽  
Chunyan Cao ◽  
Zhengliang Hu ◽  
Heng Yang ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Optical Cavity ◽  
Optical Quality ◽  
Optical Force ◽  
Mechanical Oscillator ◽  
Maximum Displacement ◽  
Optomechanical System ◽  
High Optical Quality ◽  
Hybrid Platform ◽  
Optomechanical Coupling

Optomechanical nanocavities open a new hybrid platform such that the interaction between an optical cavity and mechanical oscillator can be achieved on a nanophotonic scale. Owing to attractive advantages such as ultrasmall mass, high optical quality, small mode volume and flexible mechanics, a pair of coupled photonic crystal nanobeam (PCN) cavities are utilized in this paper to establish an optomechanical nanosystem, thus enabling strong optomechanical coupling effects. In coupled PCN cavities, one nanobeam with a mass meff~3 pg works as an in-plane movable mechanical oscillator at a fundamental frequency of . The other nanobeam couples light to excite optical fundamental supermodes at and 1554.464 nm with a larger than 4 × 104. Because of the optomechanical backaction arising from an optical force, abundant optomechanical phenomena in the unresolved sideband are observed in the movable nanobeam. Moreover, benefiting from the in-plane movement of the flexible nanobeam, we achieved a maximum displacement of the movable nanobeam as 1468 . These characteristics indicate that this optomechanical nanocavity is capable of ultrasensitive motion measurements.

scholarly journals Universality in electron–modulated-acoustic-phonon interactions in a free-standing semiconductor nanowire

2010 ◽  
Vol 51 (7-8) ◽  
pp. 880-887 ◽  
Author(s):  
Junichi Hattori ◽  
Shigeyasu Uno ◽  
Nobuya Mori ◽  
Kazuo Nakazato
Keyword(s):  
Acoustic Phonon ◽  
Free Standing ◽  
Semiconductor Nanowire

Two–membrane Cavity Optomechanics: Non–linear Dynamics And Measurement Of The Optomechanical Coupling

2021 ◽  
Author(s):  
Paolo Piergentili ◽  
Wenlin Li ◽  
Riccardo Natali ◽  
Nicola Malossi ◽  
David Vitali ◽  
...  
Keyword(s):  
Cavity Optomechanics ◽  
Linear Dynamics ◽  
Non Linear ◽  
Optomechanical Coupling

scholarly journals Multimode Cavity Optomechanics

Proceedings ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 54
Author(s):  
Paolo Piergentili ◽  
Letizia Catalini ◽  
Mateusz Bawaj ◽  
Stefano Zippili ◽  
Nicola Malossi ◽  
...  
Keyword(s):  
Relative Motion ◽  
Coupling Strength ◽  
Single Photon ◽  
Mechanical Resonators ◽  
Cavity Optomechanics ◽  
Optomechanical System ◽  
Single Membrane ◽  
Fabry Perot ◽  
Optomechanical Coupling ◽  
Photon Coupling

We study theoretically and experimentally the behavior of an optomechanical system where two vibrating dielectric membranes are placed inside a driven Fabry-Pérot cavity. We prove that multi–element systems of mechanical resonators are suitable for enhancing optomechanical performances, and we report a ∼2.47 gain in the optomechanical coupling strength of the membrane relative motion with respect to the single membrane case. With this configuration it is possible to enable cavity optomechanics in the strong single-photon coupling regime.

scholarly journals Observation of nonlinear dynamics in an optical levitation system

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Jinyong Ma ◽  
Jiayi Qin ◽  
Geoff T. Campbell ◽  
Giovanni Guccione ◽  
Ruvi Lecamwasam ◽  
...  
Keyword(s):  
Optical Cavity ◽  
Mechanical Quality Factor ◽  
Optical Field ◽  
Free Standing ◽  
Levitation System ◽  
Active Feedback ◽  
Sideband Generation ◽  
Optical Levitation ◽  
Mechanical Oscillators ◽  
Lift Off

Abstract Optical levitation of mechanical oscillators has been suggested as a promising way to decouple the environmental noise and increase the mechanical quality factor. Here, we investigate the dynamics of a free-standing mirror acting as the top reflector of a vertical optical cavity, designed as a testbed for a tripod cavity optical levitation setup. To reach the regime of levitation for a milligram-scale mirror, the optical intensity of the intracavity optical field approaches 3 MW cm−2. We identify three distinct optomechanical effects: excitation of acoustic vibrations, expansion due to photothermal absorption, and partial lift-off of the mirror due to radiation pressure force. These effects are intercoupled via the intracavity optical field and induce complex system dynamics inclusive of high-order sideband generation, optical bistability, parametric amplification, and the optical spring effect. We modify the response of the mirror with active feedback control to improve the overall stability of the system.

Mitigation of Sliding Motion of a Cask-Canister by Fluid-Structure Interaction in an Annular Region

2011 ◽  
Author(s):  
Tomohiro Ito ◽  
Yoshihiro Fujiwara ◽  
Atsuhiko Shintani ◽  
Chihiro Nakagawa ◽  
Kazuhisa Furuta
Keyword(s):  
Equations Of Motion ◽  
Fluid Structure Interaction ◽  
Shaking Table ◽  
Annular Region ◽  
Test Model ◽  
Free Standing ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Sliding Motion ◽  
Standing Structure

The cask-canister system is a coaxial circular cylindrical structure in which several spent fuels are installed. This system is a free-standing structure thus, it is very important to reduce sliding motion for very large seismic excitations. In this study, we propose a mitigation method for sliding motion. Water is installed in an annular region between a cask and a canister. The equations of motion are derived taking fluid-structure interaction into consideration for nonlinear sliding motion analyses. Based on these equations, mitigation effects of sliding motions are studied analytically. Furthermore, a fundamental test model of a cask-canister system is fabricated and shaking table tests are conducted. From the analytical and test results, sliding motion mitigation effects are investigated.

scholarly journals Highly sensitive pressure sensors employing 3C-SiC nanowires fabricated on a free standing structure

2018 ◽  
Vol 156 ◽  
pp. 16-21 ◽  
Author(s):  
Hoang-Phuong Phan ◽  
Karen M. Dowling ◽  
Tuan Khoa Nguyen ◽  
Toan Dinh ◽  
Debbie G. Senesky ◽  
...  
Keyword(s):  
Pressure Sensors ◽  
Free Standing ◽  
Sic Nanowires ◽  
Highly Sensitive ◽  
Standing Structure ◽  
Sensitive Pressure

Mitigation of Rocking and Sliding Motion of a Free-Standing Structure Subjected to Base Excitation Using Coaxial Circular Cylinders Containing Highly Viscous Liquid in Annular Spaces

2019 ◽  
Author(s):  
Atsuhiko Shintani ◽  
Tomohiro Ito ◽  
Chihiro Nakagawa
Keyword(s):  
Rigid Body ◽  
Viscous Liquid ◽  
Analytical Model ◽  
Circular Cylinders ◽  
Base Excitation ◽  
Free Standing ◽  
Seismic Input ◽  
Sliding Motion ◽  
Standing Structure ◽  
Rocking Motion

Abstract In this study, the effectiveness of coaxial circular cylinders containing a highly viscous liquid in annular spaces for reduction of rocking motion of a free-standing structure is investigated both analytically and experimentally. First, an analytical model of coupled rocking and sliding motions of a free-standing structure, including the coaxial circular cylinders, subjected to seismic input was derived. The free-standing structure was modeled as a free-standing rigid body. The cylinders were attached to the bottom of the rigid body as a damping device. We then experimentally derived the friction coefficients, inertia moments, and a damping coefficient in the rotating direction. Furthermore, using these parameters, the effectiveness of this system in suppressing the rocking motion is investigated analytically. The proposed method was determined to be very effective in suppressing the rocking motion of a rigid body subjected to a seismic input by the experiment.

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