Tunable ferroelectric photonic crystals based on Ba0.7Sr0.3TiO3/MgO multilayer thin films

被引：1
作者：
Wang, D. Y. [1 ]
Jim, K. L.
Leung, C. W.
Chan, H. L. W.
Choy, C. L.
机构：
[1] Hong Kong Polytech Univ, Dept Appl Phys, Kowloon, Hong Kong, Peoples R China
来源：
MICRO (MEMS) AND NANOTECHNOLOGIES FOR DEFENSE AND SECURITY | 2007年 / 6556卷
关键词：
photonic crystal; BST thin film; index-tunable;
D O I：
10.1117/12.721060
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
It is of interest to the optoelectronic community if index-tunable photonic crystals can be realized by using ferroelectric materials since the refractive index of ferroelectric materials can be electrically tuned through the electro-optic effect. In this paper, we present our work on developing a tunable one-dimensional (1D) photonic crystal (PC) based on a Ba0.7Sr0.3TiO3/MgO MUltilayer structure. A ferroelectric ID photonic crystal consisting of a Ba0.7Sr0.3TiO3/MgO multilayer thin film was epitaxially deposited on a MgO (001) single-crystal substrate by pulsed laser deposition. A photonic band gap in the visible region is observed in the transmission spectrum of the multilayer thin film. The centre wavelength of the band gap is similar to 464 nm, which agrees with the simulation result obtained by the transfer matrix method. The band gap can be tuned by an external electric field E. The band gap shifts about 2 nm under a dc voltage of 240 V (E similar to 12 MV/m).
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页数：8
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