Tunable ferroelectric photonic crystals based on Ba0.7Sr 0.3TiO3/MgO multilayer thin films

D. Y. Wang, K. L. Jim, Chi Wah Leung, H. L W Chan, C. L. Choy

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

2 Citations (Scopus)


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 1D 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 ∼ 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).
Original languageEnglish
Title of host publicationMicro (MEMS) and Nanotechnologies for Defense and Security
Publication statusPublished - 15 Nov 2007
EventMicro (MEMS) and Nanotechnologies for Defense and Security - Orlando, FL, United States
Duration: 10 Apr 200712 Apr 2007


ConferenceMicro (MEMS) and Nanotechnologies for Defense and Security
Country/TerritoryUnited States
CityOrlando, FL


  • BST thin film
  • Index-tunable
  • Photonic crystal

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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