Design of Pressure Sensor Based on Two-Dimensional Photonic Crystal

Abstract

In this work, we design a new pressure sensor based on two-dimensional photonic crystal waveguide coupled to a point-defect resonant microcavity. The mechanism of sensing is based on the change of the germanium refractive index as function of the hydrostatic pressure P . The resonant wavelength will shift when pressure variation induces change in the refractive indexes of the structure. The pressure variation causes the shifting of defect modes. The properties of the refractive index sensor are simulated using the finite-difference time-domain algorithm and the plane wave expansion method. These kinds of sensors have many advantages in compactness, high sensitivity, and various choices of materials.

A Comparative Analysis of Pressure Sensing Parameters for Two Dimensional Photonic Crystal Sensors Based on Si and GaAs

“…Sensitivity of proposed structure for Si is 1.674 nm/GPa which is much less than the sensitivity of GaAs as 17.00 nm/GPa. Comparing with previously reported 2 D PhCs pressure sensor work which have sensitivity of 11.7 nm/GPa [24], 13.9 nm/GPa [25] and 15.8 nm/GPa [10], our senor using GaAs structure have higher sensitivity of 17.0 nm/ GPa.…”

“…When defects are inserted in perfect lattices, then localised mode density can be tuned by external perturbation like temperature, pressure etc. [8][9][10][11][12].…”

Design and Analysis of 2D Photonic Crystal Based Biosensor to Detect Different Blood Components

“…In the first scheme, the resonant wavelength shift is noticed for different values of analytes. Alternatively, the intensity is reduced while varying the dielectric parameters of the analytes [22][23][24][25][26]. There are several methods reported to sense the refractive index change of various biosensors, namely brass grating, Mach-Zehnder interferometer, and micro ring resonator [23,24].…”

High Sensitivity Temperature Sensor Based on Two-Dimensional Photonic Crystal

“…They can detect accurately, respond rapidly and integrate easily into various platforms. PhC-based sensors have been developed in a wide range of sensing applications such as temperature [3]- [5], pressure [6]- [8], refractive index [9], magnetic fields [10], electric fields [11], chemicals [12]- [14] and biomolecules [15]- [17].…”