Six-fold hybrid photonic crystal formed holographically with full band gap for low refractive indexG.-Y. Dong, X.-L. Yang, L.-Z. Cai, X.-X. Shen, X.-F. Meng, X.-F. Xu and H. Zhang
Department of Optics, Shandong University - Jinan, 250100, China
received 4 July 2007; accepted in final form 17 August 2007; published October 2007
published online 12 September 2007
A novel kind of two-dimensional (2D) photonic crystals conforming to the 6-fold hybrid triangular configuration formed by holographic lithography is proposed. The relations between their photonic band gap properties and their specific holographic designs for the normal structures are systematically investigated. Computations show that this normal structure has complete band gaps over wide ranges of system parameters, and the minimum dielectric constant required to open a complete band gap with > 1% is as low as 3.8, which is the lowest compared with the results of 2D periodic photonic crystals ever reported. The latter fact is also verified by light propagation simulation in waveguide. This work may make holographic photonic crystals promising for application in the range of optical devices and provide a guideline for their design and experimental fabrication.
42.40.Kw - Holographic interferometry; other holographic techniques.
42.70.Qs - Photonic bandgap materials.
42.25.Bs - Wave propagation, transmission and absorption.
© Europhysics Letters Association 2007