Magneto-plasmonic sensor with one dimensional photonic crystal for methane detection

In this paper we present a highly sensitive magneto-optical surface plasmon resonance (MOSPR) sensor based on Ce1Y2Fe5O12 (Ce:YIG), noble metal (Gold) and one dimensional photonic crystal (1D-PC) for methane detection. We find that due to a combination of strong magneto-optical effect of Ce:YIG and ultralong surface plasmon propagation caused by one dimensional photonic crystal, sensitivity of the sensor to the methane concentration variation achieve a maximum value of 178.2/1%. These results indicate a great potential for application of the structure in methane detection.