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 1571nm were realized using one-dimensional photonic crystals (1D PCs) formed from a-Si and SiO2. 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 1.1nm for wavelengths of 1571 and 1519nm, respectively.

© 2011 Optical Society of America

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