Parametric optimization of narrow bandstop optical filters using the self-suspended subwavelength grating for TE polarization

Jia Sheng Ye, Yoshiaki Kanamori, Fang Ren Hu, Kazuhiro Hane

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Instead of a conventional fixed multilayer grating, a self-suspended subwavelength grating (SSG) which consists of a single grating layer and possesses tunable functions, is investigated by the rigorous coupled-wave method in detail. Through optimizing various parameters including the incident wavelength, the grating period, the grating thickness and the grating filling factor, we demonstrate that the silicon dioxide (SiO2) SSG owns a narrow reflectance linewidth in the case of TE polarization. For the SiO2 SSG, the reflectance peak splits into two branches when the incident light deviates from normal incidence. In addition, the reflectance property of the SiO2 SSG with unoptimized parameters is also presented for comparison, which exhibits a much larger reflectance linewidth. It is expected that the SiO2 SSG should be used as narrow bandstop optical filters for TE polarization in micro optics systems.

Original languageEnglish
Pages (from-to)1519-1528
Number of pages10
JournalJournal of Modern Optics
Volume55
Issue number10
DOIs
Publication statusPublished - 2008 Jun 1

Keywords

  • Narrow bandstop optical filters
  • Reflectance linewidth
  • Rigorous coupled-wave method
  • SiO self-suspended subwavelength grating
  • TE polarization

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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