Kondakci, H. E.Yaman, M.Koylu, O.Dana, A.Bayındır, Mehmet2016-02-082016-02-0820091077-3118http://hdl.handle.net/11693/22801We 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.EnglishEnergy gapGlassInfrared spectrometersOptical devicesRefractive indexAmorphous chalcogenidesCavity modesChalcogenide glassHigh refractive index contrastsInfrared filtersInfrared regionsLow lossPhotonic band gap filtersPhotonic bandsReflection measurementsSpectral imagingStop bandsTheoretical calculationsVariable filtersPhotonic band gapArticle10.1063/1.3103279