Photonic crystal ring resonator structure for temperature measurement

Photonic sensing technology has extended physical parameter like temperature sensing for vast range of applications. The basic principle of the photonic sensing technology is to observe the change of refractive index. The photonic crystal ring resonator structure aid in increasing the sensitivity of the designed sensor. In this paper, we propose a design of a photonic crystal ring resonator based sensor for the detection of temperature change at micron level. As the temperature change there is change in the refractive index profile of photonic crystal. This causes the central frequency, wavelength to change with respect to change in temperature. By capturing the change in the wavelength and frequency, the temperature change can be detected. The transmission and reflection spectrum are analyzed with the help of simulation tool MIT Electromagnetic Equation Propagation (MEEP). It is observed that the wavelength and frequency is shifted as the temperature is varied.