Torsional frequency mixing and sensing in optomechanical resonators

Torsional frequency mixing and sensing in optomechanical resonators

In this letter, a torsional optomechanical resonator for torque sensing and torsional mechanical frequency mixing is experimentally demonstrated. The torsional mechanical resonator is embedded into a split optical racetrack resonator, which provides high sensitivity in measuring torsional mechanical...

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Bibliographic Details
Main Authors: Huang, Jianguo, Cai, H., Gu, Y. D., Chin, Lip Ket, Wu, J. H., Chen, T. N., Yang, Z. C., Hao, Y. L., Liu, Aiqun
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2017
Subjects:
Optomechanics
Acoustic Noise
Online Access:https://hdl.handle.net/10356/86880
http://hdl.handle.net/10220/44217
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Institution: Nanyang Technological University
Language: English
Description
Summary:In this letter, a torsional optomechanical resonator for torque sensing and torsional mechanical frequency mixing is experimentally demonstrated. The torsional mechanical resonator is embedded into a split optical racetrack resonator, which provides high sensitivity in measuring torsional mechanical motion. Using this high sensitivity, torsional mechanical frequency mixing is observed without regenerative mechanical motion. The displacement noise floor of the torsional mechanical resonator is 50 fm/Hz0.5, which demonstrates a resonant torque sensitivity of 3.58 × 10−21 N m/Hz0.5. This demonstration will benefit potential applications for on-chip RF signal modulation using optical mechanical resonators.

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