Observation of Complete Photonic Bandgap in Low Refractive Index Contrast Inverse Rod-Connected Diamond Structured Chalcogenides

Chen, Lifeng, Morgan, Katrina A., Alzaidy, Ghada A., Huang, Chung-Che, Ho, Daniel, Taverne, Mike P. C., Zheng, Xu, Ren, Zhong, Feng, Zhuo, Zeimpekis, Ioannis, Hewak, Daniel W. and Rarity, John G. (2019) Observation of Complete Photonic Bandgap in Low Refractive Index Contrast Inverse Rod-Connected Diamond Structured Chalcogenides. ACS Photonics, 6 (5). pp. 1248-1254. ISSN 2330-4022

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Abstract

Three-dimensional complete photonic bandgap materials or photonic crystals block light propagation in all directions. The rod-connected diamond structure exhibits the largest photonic bandgap known to date and supports a complete bandgap for the lowest refractive index contrast ratio down to nhigh/nlow ∼ 1.9. We confirm this threshold by measuring a complete photonic bandgap in the infrared region in Sn–S–O (n ∼ 1.9) and Ge–Sb–S–O (n ∼ 2) inverse rod-connected diamond structures. The structures were fabricated using a low-temperature chemical vapor deposition process via a single-inversion technique. This provides a reliable fabrication technique of complete photonic bandgap materials and expands the library of backfilling materials, leading to a wide range of future photonic applications.

Item Type:	Article
Uncontrolled Keywords:	direct laser writing, two-photon lithography, chemical vapor deposition, chalcogenide materials, photonic bandgap, three-dimensional photonic crystals
Subjects:	H600 Electronic and Electrical Engineering J500 Materials Technology not otherwise specified
Department:	Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User:	Paul Burns
Date Deposited:	12 Sep 2019 09:26
Last Modified:	10 Oct 2019 15:18
URI:	http://nrl.northumbria.ac.uk/id/eprint/40648

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