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Realization of 2D pressure sensor using germanium photonic crystal waveguide via FDTD method

C. S. MISHRA1, G. PALAI2,* , R. N. SATPATHY2, P. SARKAR3

Affiliation

  1. Department of ECE, Gandhi Institute for Technological Advancement (GITA), Bhubaneswar, India
  2. Sri Sri University, Cuttack, Odisha, 754006, India
  3. JIS College of Engineering, West Bengal, India

Abstract

In this research paper, Germanium based L-shape photonic crystal structure is used to realise a pressure sensor pertaining to the amount of pressure ranging from 0 gigapascal to 10 gigapascal. Further, the electric distribution field in the ‘L’ shape defect (15×15) is computed at the incident signal of 1550 nm (laser source), where the radius of the germanium rods varies from 410 nm to 440 nm at the same pressure range and lattice spacing remains 900 nm. Further, the output power is thoroughly discussed with respect to the peak electric field of output simulation. Here, the principle of sensing mechanism relies on the electric field distribution pertaining to the different pressures (up to 10 GPa). The radius (r=0.42a) of the rod outlet depends on the lattice constant (a). The simulation is done for all variations of pressure and radius of the rod, where the finite difference time method is applied to obtain electric field distribution. The output power result shows mixed linear as well as nonlinear behavior with respect to the increment of radius at the applied pressure range. This research paper is applicable for pressure sensing with respect to the 2D photonic crystal (Ge)..

Keywords

Photonic crystal fiber, Pressure, 2D photonic crystal, FDTD, Pressure, Electric field distribution.

Submitted at: Dec. 1, 2023
Accepted at: June 3, 2024

Citation

C. S. MISHRA, G. PALAI, R. N. SATPATHY, P. SARKAR, Realization of 2D pressure sensor using germanium photonic crystal waveguide via FDTD method, Journal of Optoelectronics and Advanced Materials Vol. 26, Iss. 5-6, pp. 179-185 (2024)