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Large omnidirectional reflection range using combination of periodic and Fibonacci quasiperiodic structures

S. KUMAR SINGH1,* , K. B. THAPA1, S. P. OJHA1

Affiliation

  1. Department of Applied Physics, Institute of Technology, Banaras Hindu University, Varanasi-221005, India

Abstract

We show numerically that the omnidirectional reflection range of a dielectric multilayer structure can be enlarged by combining a Fibonacci quasiperiodic structure and a periodic structure. Our Fibonacci quasiperiodic structure has two regions of high reflection, but only one region exhibits omnidirectional reflection. Periodic structure has one omnidirectional reflection region. The resultant structure exhibits a large omnidirectional reflection band covering not only omnidirectional reflection region but also non-omnidirectional reflection region of the Fibonacci structure. Reflection bands of the two constituent photonic crystals should overlap each other at all incidence angles to form the heterostructure with large omnidirectional photonic band gap.

Keywords

Omnidirectional reflection, Multilayer structure, Fibonacci quasi-periodic structure, Photonic heterostructure.

Citation

S. KUMAR SINGH, K. B. THAPA, S. P. OJHA, Large omnidirectional reflection range using combination of periodic and Fibonacci quasiperiodic structures, Optoelectronics and Advanced Materials - Rapid Communications, 1, 2, February 2007, pp.49-51 (2007).

Submitted at: Sept. 11, 2006

Accepted at: Jan. 15, 2007