Photonic Bandgap Structures of Core-Shell Simple Cubic Crystals from Holographic Lithography
Document Type Journal Article
Postprint version. Published in Applied Physics Letters, Volume 88, Issue 12, Article 121101, March 2006, 3 pages.
Publisher URL: http://dx.doi.org/10.1063/1.2187438
We report the investigation of photonic band-gap properties of a core-shell simple cubic structure (air core with a dielectric shell) using a two-parameter level-set approach. The proposed structure can be obtained by partially backfilling high refractive index materials into a polymeric template fabricated by multibeam interference lithography. We find that the shell formation in the inverted simple cubic structure increases the complete photonic band-gap width by 10%–20% in comparison to that of a completely filled structure. The band gap between the fifth and sixth bands begins to appear at a refractive index contrast of 2.7. This study suggests the importance to investigate the core-shell formation in three-dimensional photonic crystals through backfilling, which may offer an additional control over their photonic band-gap properties.
Date Posted: 20 August 2006
This document has been peer reviewed.