title: Anomalous refractive effects in honeycomb lattice photonic crystals formed by holographic lithography.
abstract: We have investigated for the first time the anomalous refractive effects of a photonic crystal (PhC) formed by holographic lithography (HL) with triangular rods arranged in a honeycomb lattice in air. Possibilities of left-handed negative refraction and superlens are discussed for the case of TM2 band with the index contrast n = 3.4:1. In contrast to the conventional honeycomb PhC made of regular rods in air, the HL PhCs show left-handed negative refraction over a wider and higher frequency range with high transmissivity (>90%), and the effective indices quite close to -1 for a wide range of incident angles with a larger all-angle left-handed negative refraction (AALNR) frequency range (Deltaomega/omega approximately 14.8%). Calculations and FDTD simulations demonstrate the high-performance negative refraction properties can happen in the holographic structures for a wide filling ratio and can be modulated by changing the filling ratio easily.
authors: School of Science, Shandong Jianzhu University, Jinan 250101, China. gydong@sdu.edu.cn
authors: G Y
authors: GY
authors: Dong
authors: X L
authors: XL
authors: Yang
authors: L Z
authors: LZ
authors: Cai
mesh_terms: D003198:Computer Simulation; D003460:Crystallization; D004867:Equipment Design; D006696:Holography / Q000379:methods*; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008962:Models, Theoretical; D017785:Photons; D011327:Printing / Q000379:methods*