title: Wavelength-selective filter based on a hollow optical waveguide.
abstract: In this paper, we describe a theoretical and experimental study of a wavelength-selective filter derived from hollow optical waveguides composed of Bragg reflectors with defect layers on a silicon substrate. The defect states of the transmission filter at wavelengths of 1519 and 1571 nm were realized using one-dimensional photonic crystals (1D PCs) formed from a-Si and SiO(2). The transmission spectra of the filter waveguides and the band structure of the defect 1D PCs were calculated using the two-dimensional finite-difference time-domain and transfer matrix methods, respectively. The device exhibited the narrow bandwidths of 0.5 and 1.1 nm for wavelengths of 1571 and 1519 nm, respectively.
authors.affiliation: Department of Optics and Photonics, National Central University, Jhongli 32001, Taiwan.
authors.forename: Hua-Kung
authors.initials: HK
authors.lastname: Chiu
authors.forename: Chung-Hsing
authors.initials: CH
authors.lastname: Chang
authors.forename: Chia-Hung
authors.initials: CH
authors.lastname: Hou
authors.forename: Chii-Chang
authors.initials: CC
authors.lastname: Chen
authors.forename: Chien-Chieh
authors.initials: CC
authors.lastname: Lee