声光子晶体微腔的光声传感特性  

The Sensing Characteristics of Phoxonic Crystal Microcavity

作　　者：周志成 何灵娟[1] 陈华英[1] 于天宝[1] 刘念华 ZHOU Zhi-cheng;HE Ling-juan;CHEN Hua-ying;YU Tian-bao;LIU Nian-hua(Department of Physics, Nanchang University, NanChang 3 3 0 0 31, China;Institute for Advanced Study, Nanchang University, NanChang 3 3 0 0 31, China)

机构地区：[1]南昌大学物理系,江西南昌330031 [2]南昌大学高等研究院,江西南昌330031

出　　处：《量子光学学报》2018年第2期198-203,共6页Journal of Quantum Optics

基　　金：国家自然科学基金(11664024);江西省杰出青年基金(20171BCB23009)

摘　　要：声光子晶体是一种同时具有光子和声子带隙的人工微结构，因此可实现对光和声的同时操控，在腔光力学及声光功能器件领域展现了广阔的应用前景。本文基于有限元数值计算方法，研究了声光子晶体微腔的光声传感特性。研究结果表明，通过简单地引入点缺陷，声光子晶体不仅能很好地实现对光和声场的同时局域，而且能同时获得光及声信号的高灵敏度传感，光、声传感灵敏度分别达到了277nm／RIU，2．75MHz／ms^-1。由于光和声两个物理量能同时并独立地实现高灵敏度传感，因此该种传感器能应用于更为复杂的生化传感。Phoxonic crystal （PhXCs） is a kind of artificial microstructure which has both photonic and phononic band gaps. Thus PhXCs can simultaneously tailor electromagnetic and elastic waves with potential applications for highly controllable photon-phonon interactions and acousto-optical devices. The sensing characteristic of PhXCs microcavity is investigated via the finite element method. By calculating the light and acoustic transmission spectrum, phoxonic sensitivity is obtained. The research results show PhXCs can simultaneously not only confine optical and acoustic waves, but also provide high sensitivity to optical and acoustic waves by simply introducing a point defect into a perfect PhXCs. The optical sensitivity and acoustic sensitivity reaches 277 nm/RIU, 2.75 MHz/ms-1 respectively. This kind sensor can deal with complex analytes for biosystems due to the fact that it can determine two independent physical properties simultaneously.

关 键 词：声光子带隙 微腔 声光传感 灵敏度 

分 类 号：O431[机械工程—光学工程]