All-chalcogenide glass omnidirectional photonic band gap variable infrared filters
Date
2009
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Source Title
Applied Physics Letters
Print ISSN
1077-3118
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Publisher
AIP Publishing
Volume
94
Issue
11
Pages
111110-1 - 111110-3
Language
English
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Abstract
We report on the design, fabrication, and characterization of spatially variable infrared photonic band gap filter that consists of thermally evaporated, high refractive indexcontrast, amorphous chalcogenide glass multilayers. Due to graded thickness structure, the filter exhibits a position dependent stop band and a cavity mode ranging from 1.8 to 3.4 μm3.4 μmwavelengths. Reflection measurements on the variable filter agree well with theoretical calculations. These results pave the way to low-loss infrared mirrors, filters, spectral imaging, and miniaturized spectrometers at infrared region.
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Keywords
Energy gap , Glass , Infrared spectrometers , Optical devices , Refractive index , Amorphous chalcogenides , Cavity modes , Chalcogenide glass , High refractive index contrasts , Infrared filters , Infrared regions , Low loss , Photonic band gap filters , Photonic bands , Reflection measurements , Spectral imaging , Stop bands , Theoretical calculations , Variable filters , Photonic band gap