NARROWBAND INFRARED EMITTER BASED ON ONE-DIMENSIONAL PHOTONIC CRYSTALS USED FOR GAS SENSING
用于气体传感的一维光子晶体窄带红外发射光源

Based on one-dimensional photonic crystals, a narrowband quasi-coherent infrared thermal emitter with the central wavelength corresponding to the infrared absorption peak of CO2 was designed. Its central wavelength, emissivity and full width at half maximum (FWHM) are 4.23 μm, 〉 99% and 49.9nm, respectively. Transfer matrix method (TMM) and finite difference time domain method (FDTD) were used to analyze and simulate this infrared thermal emitter respectively. The results obtained by theory calculations and simulated spectral property are consistent. So the feasibility of this kind of narrowband thermal emitter is verified.