Please use this identifier to cite or link to this item:
Title: A nanoscale photonic crystal cavity optomechanical system for ultrasensitive motion sensing
Authors: Xia, Ji
Wang, Fuyin
Cao, Chunyan
Hu, Zhengliang
Yang, Heng
Xiong, Shuidong
Keywords: Displacement sensitivity
Optical force
Optomechanical coupling
Photonic crystal nanobeam
Issue Date: 21-Apr-2021
Publisher: MDPI AG
Citation: Xia, Ji, Wang, Fuyin, Cao, Chunyan, Hu, Zhengliang, Yang, Heng, Xiong, Shuidong (2021-04-21). A nanoscale photonic crystal cavity optomechanical system for ultrasensitive motion sensing. Crystals 11 (5) : 462. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: 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 ?m /2? = 4.148 MHz. The other nanobeam couples light to excite optical fundamental supermodes at 1542.858 and 1554.464 nm with a Qo 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 fm/Hz1/2 . These characteristics indicate that this optomechanical nanocavity is capable of ultrasensitive motion measurements. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Source Title: Crystals
ISSN: 2073-4352
DOI: 10.3390/cryst11050462
Rights: Attribution 4.0 International
Appears in Collections:Students Publications

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
10_3390_cryst11050462.pdf26.2 MBAdobe PDF




checked on Oct 12, 2022

Page view(s)

checked on Nov 24, 2022

Google ScholarTM



This item is licensed under a Creative Commons License Creative Commons