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Temperature sensor and monochromatic filter based on one-dimensional photonic crystal containing Si and SiO2 with a defect layer of liquid crystal

PAWAN SINGH1, KHEM B. THAPA1,* , GIRIJESH N. PANDEY2

Affiliation

  1. Department of Physics, School of Physical and Decision Sciences, Babasaheb Bhimrao Ambedkar University (A Central University), Vidya Vihar, Raebareli Road, Lucknow-226025 (UP), India
  2. Department of Applied Physics, Amity Institute of Applied Sciences, Amity University, Sector- 125, Express Highway, Noida (UP), India

Abstract

In this article, we have proposed a temperature sensor and monochromatic filter based on one-dimensional photonic crystal (1DPC) containing Si and SiO2 layers with liquid crystal (LC) as a defect layer i.e. (Si|SiO2)3|LC|(Si|SiO2)3 structure. By applying the transfer matrix method (TMM), we have studied transmission properties of the (Si|SiO2)3|LC|(Si|SiO2)3 structure. The tunable transmission characteristics of the periodic structure (Si|SiO2)3|LC|(Si|SiO2)3 are investigated with the variation of temperature of the LC layer as well as the incident angle of the electromagnetic wave. The calculated transmission peak of defect mode lies in photonic band gap (PBG) region of the 1DPC, and the transmission peak of the defect mode shifts with the temperature variation of the LC. The transmittance of defect mode peak in PBG region of the 1DPC has analyzed with the variation of temperature, and suggested a temperature sensor as well as a monochromatic filter based on the (Si|SiO2)3|LC|(Si|SiO2)3structure..

Keywords

Temperature sensor, Liquid crystal, Photonic crystal and transfer matrix method.

Citation

PAWAN SINGH, KHEM B. THAPA, GIRIJESH N. PANDEY, Temperature sensor and monochromatic filter based on one-dimensional photonic crystal containing Si and SiO2 with a defect layer of liquid crystal, Optoelectronics and Advanced Materials - Rapid Communications, 13, 7-8, July-August 2019, pp.401-406 (2019).

Submitted at: Aug. 28, 2018

Accepted at: Aug. 20, 2019