Tunable multichannel filter in a semiconductor photonic quantum well structure

A multichannel filter can be achieved in a photonic quantum well structure. In this work, based on the use of n-doped GaAs as a constituent of photonic quantum well, the filter can be tunable, i.e., it can be tuned by the hydrostatic pressure and the temperature. It is found that there is a critical pressure at which a minimum peak frequency occurs. Above or below this critical pressure, the peak frequency will be blue-shifted. As for the temperature effect, we find that the peak frequency is red-shifted as the temperature increases. This tunable multichannel filter is of technical use in semiconductor optoelectronics. The analysis is done from the transmission spectra calculated by using the transfer matrix method.