Strong Optomechanical Interaction in Hybrid Plasmonic-Photonic Crystal Nanocavities with Surface Acoustic Waves

被引:23
|
作者
Lin, Tzy-Rong [1 ,2 ]
Lin, Chiang-Hsin [2 ]
Hsu, Jin-Chen [3 ]
机构
[1] Natl Taiwan Ocean Univ, Dept Mech & Mechatron Engn, Keelung 20224, Taiwan
[2] Natl Taiwan Ocean Univ, Inst Optoelect Sci, Keelung 20224, Taiwan
[3] Natl Yunlin Univ Sci & Technol, Dept Mech Engn, Touliu 64002, Yunlin, Taiwan
来源
SCIENTIFIC REPORTS | 2015年 / 5卷
关键词
LASERS; CAVITY; LIGHT;
D O I
10.1038/srep13782
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
We propose dynamic modulation of a hybrid plasmonic-photonic crystal nanocavity using monochromatic coherent acoustic phonons formed by ultrahigh-frequency surface acoustic waves (SAWs) to achieve strong optomechanical interaction. The crystal nanocavity used in this study consisted of a defective photonic crystal beam coupled to a metal surface with a nanoscale air gap in between and provided hybridization of a highly confined plasmonic-photonic mode with a high quality factor and deep subwavelength mode volume. Efficient photon-phonon interaction occurs in the air gap through the SAW perturbation of the metal surface, strongly coupling the optical and acoustic frequencies. As a result, a large modulation bandwidth and optical resonance wavelength shift for the crystal nanocavity are demonstrated at telecommunication wavelengths. The proposed SAW-based modulation within the hybrid plasmonic-photonic crystal nanocavities beyond the diffraction limit provides opportunities for various applications in enhanced sound-light interaction and fast coherent acoustic control of optomechanical devices.
引用
收藏
页数:11
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