Abstract
SHS investigation development is considered from the geographical and historical viewpoint. 3 stages are described. Within Stage 1 the work was carried out in the Department of the Institute of Chemical Physics in Chernogolovka where the scientific discovery had been made. At Stage 2 the interest to SHS arose in different cities and towns of the former USSR. Within Stage 3 SHS entered the international scene. Now SHS processes and products are being studied in more than 50 countries.
Abstract
In this work, we theoretically investigate and study the effect of hydrostatic
pressure on the reflectance and transmittance properties of the one-dimensional PC (1D
PC) containing germanium (Ge). In the present study, we first take a 1D PC structure
composed of alternate layers of germanium (Ge) and air having a finite number of
layers. In the second case, we take the same structure by breaking its periodicity such
that each part of it acts as the mirror image of each other. The Refractive index of
germanium varies under the applied pressure, therefore both reflection bands and
transmission modes change with the applied pressure. In order to calculate
transmittance and reflectance spectra of the proposed PC, the transfer matrix method
(TMM) has been used. It has been observed that by increasing the hydrostatic pressure,
the width of the reflection band decreases and the position of reflection bands shifts
towards the lower side of wavelength. Further, the transmission modes of the
considered PC structure are blue shifted with the increase in applied hydrostatic
pressure and show high sensitivity with it.
Keywords:
Defect Mode, Photonic Crystal, Photonic Bandgap Material, Pressure Sensor, Reflectance/Transmittance Spectra, Transfer Matrix Method.
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Authors:Bentham Science Books