Hetero-Optomechanical Crystal Zipper Cavity for Multimode Optomechanics

Ning Wu,Yidong Huang,Kaiyu Cui,Xue Feng,Fang Liu,Wei Zhang

doi:10.3390/photonics9020078

Ning Wu, Yidong Huang + Show 4 more

Open Access

https://doi.org/10.3390/photonics9020078

Copy DOI

Abstract

Multimode optomechanics exhibiting several intriguing phenomena, such as coherent wavelength conversion, optomechanical synchronization, and mechanical entanglements, has garnered considerable research interest for realizing a new generation of information processing devices and exploring macroscopic quantum effect. In this study, we proposed and designed a hetero-optomechanical crystal (OMC) zipper cavity comprising double OMC nanobeams as a versatile platform for multimode optomechanics. Herein, the heterostructure and breathing modes with high mechanical frequency ensured the operation of the zipper cavity at the deep-sideband-resolved regime and the mechanical coherence. Consequently, the mechanical breathing mode at 5.741 GHz and optical odd mode with an intrinsic optical Q factor of 3.93 × 105 were experimentally demonstrated with an optomechanical coupling rate g0 = 0.73 MHz between them, which is comparable to state-of-the-art properties of the reported OMC. In addition, the hetero-zipper cavity structure exhibited adequate degrees of freedom for designing multiple mechanical and optical modes. Thus, the proposed cavity will provide a playground for studying multimode optomechanics in both the classical and quantum regimes.

Highlights

Cavity optomechanics focuses on the interaction between mechanical oscillators and light in optical cavities, and is a promising architecture for the research of macroscopic quantum effect and realizing a new generation of information processing devices [1,2]
Significant progress has been achieved in cooling the mechanical oscillator into the quantum ground state [3,4], phenomena of optomechanical induced transparency [5,6], strong optomechanical coupling effect [7,8], and optomechanical sensing [9,10,11,12] to explore the interaction between single optical cavity mode and single mechanical mode
We proposed and designed a hetero-optomechanical crystals (OMCs) zipper cavity for multimode optomechanics, wherein the mechanical coherence was ensured by the heterostructure and high-frequency mechanical modes

Summary

Introduction

Cavity optomechanics focuses on the interaction between mechanical oscillators and light in optical cavities, and is a promising architecture for the research of macroscopic quantum effect and realizing a new generation of information processing devices [1,2]. It is noticed that the confinement of the optical and mechanical modes in a wavelength scale via photonic and phononic quasiperiodic structures enables optomechanical crystals Photonics 2022, 9, 78 via photonic and phononic quasiperiodic structures enables optomechanical crystals (OMCs) to provide high-frequency mechanical modes at the GHz-scale, long decoherence (tOimMeC, sa)ntdosptrroovnigdoephtiogmh-efcrehqauneicnaclycomuepclhinangircaatlem[2o7d]e.

Results

Conclusion