Wide Range Temperature Sensors Based on One-Dimensional Photonic Crystal with a Single Defect

Abstract EN

Transmission characteristics of one-dimensional photonic crystal structure with a defect have been studied.

Transfer matrix method has been employed to find the transmission spectra of the proposed structure.

We consider a Si/air multilayer system and refractive index of Si layer has been taken as temperature dependent.

As the refractive index of Si layer is a function of temperature of medium, so the central wavelength of the defect mode is a function of temperature.

Variation in temperature causes the shifting of defect modes.

It is found that the average change or shift in central wavelength of defect modes is 0.064 nm/K.

This property can be exploited in the design of a temperature sensor.