Observation of multiple higher-order stopgaps from three-dimensional chalcogenide glass photonic crystals |
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Authors: | Nicoletti Elisa Zhou Guangyong Jia Baohua Ventura Michael James Bulla Douglas Luther-Davies Barry Gu Min |
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Institution: | Centre for Micro-Photonics, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Victoria, Australia. |
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Abstract: | For the first time to our knowledge the observation of near-IR multiple higher-order stopgaps in three-dimensional photonic crystals (PhCs) fabricated using the direct-laser-writing method in thick chalcogenide glass films is reported. The fabrication and etching conditions necessary to realize well-defined structures are presented. The fabricated PhCs exhibit higher-order stopgaps, which are only evident in high-quality structures. The higher-order stopgaps observed permit these high-refractive-index and high-nonlinear PhCs to be used directly as functional photonic devices operating at telecommunication wavelengths without further miniaturizing structural dimensions. |
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