Photonic Crystal for Gas Sensing Application
In this paper, 1D Photonic Crystal structure, consisting of alternate layers of silicon and air, is theoretically studied for gas sensing application. With one of the air layers replaced by a different gas layer, the resulting defect mode can be utilized for sensing a particular gas, from the transmittance curve, calculated by Transfer matrix method. Very small refractive index variation, ∆n = 1.5 × 10−5 and a sensitivity = 979 nm/RIU is found by this sensor.
Keywords1D photonic crystal Photonic bandgap Gas sensor
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