GaN directional couplers for integrated quantum photonics

Yanfeng, Zhang and McKnight, Loyd James and Engin, Erman and Watson, Ian and Cryan, Martin J. and Gu, Erdan and Thompson, Mark G. and Calvez, Stephane and O’Brien, Jeremy L. and Dawson, Martin (2011) GaN directional couplers for integrated quantum photonics. Applied Physics Letters, 99 (16). 161119. ISSN 0003-6951

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Abstract

Large cross-section GaN waveguides are proposed as a suitable architecture to achieve integrated quantum photonic circuits. Directional couplers with this geometry have been designed with aid of the beam propagation method and fabricated using inductively coupled plasma etching. Scanning electron microscopy inspection shows high quality facets for end coupling and a well defined gap between rib pairs in the coupling region. Optical characterization at 800 nm shows single-mode operation and coupling-length-dependent splitting ratios. Two photon interference of degenerate photon pairs has been observed in the directional coupler by measurement of the Hong-Ou-Mandel dip.

Author(s):Yanfeng, Zhang, McKnight, Loyd James, Engin, Erman, Watson, Ian ORCID logoORCID: https://orcid.org/0000-0002-8797-3993, Cryan, Martin J., Gu, Erdan ORCID logoORCID: https://orcid.org/0000-0002-7607-9902, Thompson, Mark G., Calvez, Stephane, O’Brien, Jeremy L. and Dawson, Martin ORCID logoORCID: https://orcid.org/0000-0002-6639-2989
Item type:Article
ID code:35936
Keywords:optics, GaN directional coupler , waveguides, directional couplers, wide band gap semiconductors , sputter etching, Optics. Light, Physics and Astronomy (miscellaneous)
Subjects:Science > Physics > Optics. Light
Department:Faculty of Science > Physics > Institute of Photonics
Faculty of Science > Physics
Technology and Innovation Centre > Photonics
Depositing user: Pure Administrator
Date deposited:16 Nov 2011 15:31
Last modified:22 Nov 2019 05:15
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URI:https://strathprints.strath.ac.uk/id/eprint/35936
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