The theoretical deduction for the frequency variations of the defect mode and its dependence on the incident angle in one-dimensional defective photonic crystals is discussed. Filters with the dual function of narrow frequency passbands and sharp angular pass breadths in visible and near-infrared wave bands, in which both the defect mode and the periodic structure are layers of integral times of quarter-wavelengths, were designed. This kind of filter was fabricated with commonly used coating machines.
© 2005 Optical Society of America
(120.2440) Instrumentation, measurement, and metrology : Filters
(230.4170) Optical devices : Multilayers
(310.6860) Thin films : Thin films, optical properties
(330.6110) Vision, color, and visual optics : Spatial filtering
(350.2460) Other areas of optics : Filters, interference
Shaoji Jiang, Yan Liu, Guanquan Liang, and Hezhou Wang, "Design and fabrication of narrow-frequency sharp angular filters," Appl. Opt. 44, 6353-6356 (2005)