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Title: GaN directional couplers for integrated quantum photonics

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 [C. K. Hong, et al., Phys. Rev. Lett. 59, 2044 (1987)] with 96% visibility.

Authors:
; ; ; ; ;  [1]; ; ; ;  [2]
  1. Institute of Photonics, SUPA, University of Strathclyde, Glasgow G4 0NW (United Kingdom)
  2. Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Merchant Venturers Building, Woodland Road, Bristol BS8 1UB (United Kingdom)
Publication Date:
OSTI Identifier:
22027778
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 99; Journal Issue: 16; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COUPLING; ETCHING; GALLIUM NITRIDES; INTERFERENCE; OPTICS; PHOTONS; PLASMA; SCANNING ELECTRON MICROSCOPY; SEMICONDUCTOR MATERIALS; SPUTTERING

Citation Formats

Yanfeng, Zhang, McKnight, Loyd, Watson, Ian M, Gu, Erdan, Calvez, Stephane, Dawson, Martin D, Engin, Erman, Cryan, Martin J, Thompson, Mark G, and O'Brien, Jeremy L. GaN directional couplers for integrated quantum photonics. United States: N. p., 2011. Web. doi:10.1063/1.3656073.
Yanfeng, Zhang, McKnight, Loyd, Watson, Ian M, Gu, Erdan, Calvez, Stephane, Dawson, Martin D, Engin, Erman, Cryan, Martin J, Thompson, Mark G, & O'Brien, Jeremy L. GaN directional couplers for integrated quantum photonics. United States. https://doi.org/10.1063/1.3656073
Yanfeng, Zhang, McKnight, Loyd, Watson, Ian M, Gu, Erdan, Calvez, Stephane, Dawson, Martin D, Engin, Erman, Cryan, Martin J, Thompson, Mark G, and O'Brien, Jeremy L. 2011. "GaN directional couplers for integrated quantum photonics". United States. https://doi.org/10.1063/1.3656073.
@article{osti_22027778,
title = {GaN directional couplers for integrated quantum photonics},
author = {Yanfeng, Zhang and McKnight, Loyd and Watson, Ian M and Gu, Erdan and Calvez, Stephane and Dawson, Martin D and Engin, Erman and Cryan, Martin J and Thompson, Mark G and O'Brien, Jeremy L},
abstractNote = {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 [C. K. Hong, et al., Phys. Rev. Lett. 59, 2044 (1987)] with 96% visibility.},
doi = {10.1063/1.3656073},
url = {https://www.osti.gov/biblio/22027778}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 16,
volume = 99,
place = {United States},
year = {Mon Oct 17 00:00:00 EDT 2011},
month = {Mon Oct 17 00:00:00 EDT 2011}
}