Enhanced acousto-optic interaction in two-dimensional phoxonic crystals with a line defect
Enhanced acousto-optic interaction in two-dimensional phoxonic crystals with a line defect
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DOI：
10.1063/1.4790288
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发表时间：
2013-02
影响因子：
3.2
通讯作者：
Tzy-Rong Lin;Chiang-Hsin Lin;J. Hsu
中科院分区：
文献类型：
--
作者：
Tzy-Rong Lin;Chiang-Hsin Lin;J. Hsu
本文研究了二维光子晶体中存在线缺陷时光波的声光互作用。由于在光子晶体中产生的双光子和声子带隙，光波和声波模式可以分别沿着同时用作光波导和声波腔的线缺陷沿着被引导和放大。通过有限元分析，我们表明，限制的光波和声模式在同一区域的空间（即，在缺陷中）导致通过声腔模式对光波的增强调制，并且观察到本征频率和透射峰的明显偏移。较强的声光相互作用是由放大的声场和线缺陷中光子与声子的长寿命相互作用引起的。
This study presents acousto-optic interaction of optical waves in a two-dimensional phoxonic crystal with a line defect. Because of dual photonic and phononic band gaps generated in the phoxonic crystal, optical waves and acoustic modes can be guided and amplified, respectively, along the line defect that serves simultaneously as an optical waveguide and acoustic wave cavity. By means of finite-element analysis, we show that the confinement of the optical waves and acoustic modes in the same region of space (i.e., in the defect) leads to enhanced modulation of the optical waves by an acoustic cavity mode, and obvious shifts in eigenfrequencies and transmission peaks are observed. Stronger acousto-optic interaction is caused by the amplified acoustic fields and by the long-lifetime interaction of photons and phonons in the line defect.