Kondakcı, H. EsatKöyle, ÖzlemYaman, MecitDana, AykutluBayındır, Mehmet2016-02-082016-02-0820090277-786Xhttp://hdl.handle.net/11693/28683Conference name: Proceedings of SPIE, Infrared Systems and Photoelectronic Technology IVDate of Conference: 2-6 August 2009We present the design, fabrication, characterization of spatially variable infrared filter and a demonstration of the filter as a simple infrared spectrometer. A varying photonic band gap filter which consists of thermally evaporated, high refractive index contrast amorphous chalcogenide glass multilayers, makes the structure suitable to be used as spectrometer. Due to graded thickness structure, the filter exhibits a position dependent stop band and a cavity mode ranging from 2 to 8 μm wavelengths. It is demonstrated that the filter can be used to detect absorption peaks of common gases in the cavity mode range of the filter. © 2009 SPIE.EnglishHand-held spectrometerInfrared filterOmnidirectional photonic band gapPhotonic crystalsAbsorption peaksAmorphous chalcogenideCavity modeHand-held spectrometerHigh refractive index contrastsInfrared filterInfrared filtersOmnidirectional photonic band gapPhotonic band gap filtersStop-bandsEnergy gapGas absorptionInfrared detectorsOptical devicesPhotonic crystalsRefractive indexSpectrometersSpectrometryPhotonic band gapConference Paper10.1117/12.825468