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Proceedings Paper

Self-collimation in 3D photonic crystals
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Paper Abstract

In this paper we present self-collimation in three-dimensional (3D) photonic crystals (PhCs) consisting of a simple cubic structure. By exploiting the dispersive properties of photonic crystals, a cubic-like shape equi-frequency surface (EFS) is obtained. Such surfaces allow for structureless confinement of light. Due to the degeneracy of propagation modes in a 3D structure, self-collimation modes can be distinguished from other modes by launching a source with a particular polarization. To this end, we found that polarization dependence is a key issue in 3D self-collimation. The results hold promise for high-density PhCs devices due to the lack of structural interaction. Finally, a novel method for the fabrication of three-dimensional (3D) simple cubic photonic crystal structures using conventional planar silicon micromachining technology is presented. The method utilizes a single planar etch mask coupled with time multiplexed sidewall passivation and deep anisotropic reactive ion etching in combination with isotropic etch processes to create three-dimensional photonic crystal devices. Initial experimental results are presented.

Paper Details

Date Published: 13 April 2005
PDF: 10 pages
Proc. SPIE 5733, Photonic Crystal Materials and Devices III, (13 April 2005); doi: 10.1117/12.587824
Show Author Affiliations
Dennis W. Prather, Univ. of Delaware (United States)
Shouyuan Shi, Univ. of Delaware (United States)
Sriram Venkataraman, Univ. of Delaware (United States)
Zhaolin Lu, Univ. of Delaware (United States)
Janusz Murakowski, Univ. of Delaware (United States)
Garrett Schneider, Univ. of Delaware (United States)

Published in SPIE Proceedings Vol. 5733:
Photonic Crystal Materials and Devices III
Ali Adibi; Shawn-Yu Lin; Axel Scherer, Editor(s)

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