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Genetic optimization of two-dimensional photonic crystals for large absolute band gaps under light line |
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| Authors: | L.Y. Jiang H.P. Li G.G. Zheng X.Y. Li R.H. Zhu |
| Affiliation: | 1. Department of Physics , Nanjing University of Science and Technology , Nanjing 210094, China jalyca0510@yahoo.com.cn;3. Department of Physics , Nanjing University of Science and Technology , Nanjing 210094, China;4. Institute of Electronic Engineering and Photo-electric Technology, Nanjing University of Sicence and Technology , Nanjing 210094, China |
| Abstract: | A binary genetic algorithm with floating crossover and mutation probabilities is used to design two-dimensional photonic crystals for large absolute band gaps under a light line. The unit cell is composed of a small number of round rods and is arranged in a square lattice. The photonic band structure of each chromosome is calculated by the plane-wave expansion method. Starting from randomly generated photonic crystals, the genetic algorithm finally yielded a photonic crystal with an absolute common band gap of 0.0618(2πc/a) at the mid-frequency of 0.4084(2πc/a). |
| Keywords: | photonic crystal band gap light line genetic algorithm |