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Photonic crystal; photonic band gap; plane-wave expansion method

The polarization-dependent photonic band gaps (TM and TE polarizations) in two-dimensional photonic crystals with square lattices composed of air holes in dielectric and vice versa i.e., dielectric rods in air, using the plane-wave expansion method are investigated. We then study, how the photonic band gap size is affected by the changing ellipticity of the constituent air holes/dielectric rods. It is observed that the size of the photonic band gap changes with changing ellipticity of the constituent air holes/dielectric rods. Further, it is reported, how the photonic band gap size is affected by the change in the orientation of the constituent elliptical air holes/dielectric rods in 2D photonic crystals.

Yogita Kalra¹ R K Sinha¹

1. TIFAC-Center of Relevance & Excellence in Fiber Optics & Optical Communication, Department of Applied Physics, Delhi College of Engineering, Faculty of Technology (University of Delhi), Bawana Road, New Delhi - 110 042, India

Manuscript received

5 January 2006

Manuscript revised

16 July 2006

Accepted

3 August 2006