Abstract
Tuning of bandgap in a photonic crystal is of immense importance for applications in various optical devices, such as optical filters and cavities. In this paper, a simple structural design is proposed to control both the bandgap and the bandgap window using a 1D photonic crystal. The method aims to change the bandgap by inserting a third intermediate layer of different refractive index between two layers of two fixed refractive indices in one period of the structure. The analysis is done using scattering matrix method (SMM) for a finite number of periods of the structure. The results show that there exists an optimum choice of the refractive index of the intermediate layer for which the bandgap reaches a minimum. In addition, it is also seen that refractive index of the intermediate layer can be chosen to tune the position of the bandgap window.
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Ghosh, A., Pal, A., Das, N.R. (2020). A Simple Structural Design for Tuning of Bandgap and Window in 1D Photonic Crystal. In: Janyani, V., Singh, G., Tiwari, M., Ismail, T. (eds) Optical and Wireless Technologies. Lecture Notes in Electrical Engineering, vol 648. Springer, Singapore. https://doi.org/10.1007/978-981-15-2926-9_15
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DOI: https://doi.org/10.1007/978-981-15-2926-9_15
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