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Performance analysis of two-dimensional photonic crystal octagonal ring resonator based eight channel demultiplexer

Kannaiyan V., Dhamodharan S. K., Savarimuthu R.

Optica Applicata

2017

Vol. 47, nr 1

7--18

We proposed a high performance eight channel demultiplexer using two-dimensional photonic crystal octagonal ring resonator for wavelength division multiplexing applications. The performance parameters such as transmission efficiency, Q factor, spectral width, resonant wavelength, crosstalk and channel spacing of the proposed demultiplexers are evaluated. The plane wave expansion method manipulates photonic band gap of periodic and non-periodic structure. Finite-difference time-domain method is used to evaluate the performance parameters of designed two-dimensional photonic crystal structure. The proposed demultiplexer provides overall transmission efficiency, Q factor, spectral width of about 98%, 1968 and 0.8 nm, respectively. The ultra-compact eight channel demultiplexer performs better than the reported one. Hence this work can be implemented for real time applications.

Genetic algorithm for band gap optimization under light line in two-dimensional photonic crystal slab

Jia W., Jiang L., Li H., Zheng G., Li X.

Optica Applicata

2009

Vol. 39, nr 3

481-488

An optimization algorithm is used to design a two-dimensional photonic crystal slab for large absolute band gaps under light line. In this procedure, the unit cell of the crystal is composed of a number of circular holes in silicon substrate arranged in hexagonal lattice. By optimizing the location and radius of circular hole in the unit cell, we present four designs considering different circular hole numbers. The genetic algorithm finally yielded a photonic crystal with an absolute common band gap of 0.0788(2c/a) at the mid-frequency of 0.3714(2c/a).