Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/12119
Title: Tunable ferroelectric photonic crystals based on Ba0.7Sr 0.3TiO3/MgO multilayer thin films
Authors: Wang, DY
Jim, KL
Leung, CW 
Chan, HLW 
Choy, CL 
Keywords: BST thin film
Index-tunable
Photonic crystal
Issue Date: 2007
Publisher: SPIE-International Society for Optical Engineering
Source: Proceedings of SPIE : the International Society for Optical Engineering, 2007, v. 6556, 65560Q How to cite?
Journal: Proceedings of SPIE : the International Society for Optical Engineering 
Abstract: 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 Ba0.7Sr 0.3TiO3/MgO multilayer structure. A ferroelectric 1D photonic crystal consisting of a Ba0.7Sr0.3TiO 3/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 ∼ 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 ∼ 12 MV/m).
Description: Micro (MEMS) and Nanotechnologies for Defense and Security, Orlando, FL, 10-12 April 2007
URI: http://hdl.handle.net/10397/12119
ISBN: 0819466786
9780819466785
ISSN: 0277-786X
EISSN: 1996-756X
DOI: 10.1117/12.721060
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