Optimisation of photonic crystal coupling through waveguide design

Taylor, R.J.E., Ivanov, P., Li, G. , Childs, D.T.D. and Hogg, R.A. (2017) Optimisation of photonic crystal coupling through waveguide design. Optical and Quantum Electronics, 49(2), 47. (doi: 10.1007/s11082-016-0888-0)

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This paper considers multiple structural designs for photonic crystal surface emitting lasers operating at key wavelengths. Initially a structure from Williams et al. is modelled, the structure is modified to include an additional GaAs waveguide layer (termed ballast layer) and to include an additional PC layer (termed double decker). These structures are modelled by a combination of coupling calculation and waveguide modelling and are compared to the original structure. We show that both of these schemes give an increase in coupling, but present fabrication challenges. Next, we model standard laser structures operating at key wavelengths (400 nm, 1.3 and 10 µm) where a photonic crystal is located above the active region and explore the effect of increasing thickness of photonic crystal. We find that increasing the thickness increases the coupling coefficient but not true for the full range of thicknesses considered. This study allows a more universal comparison of the use of all-semiconductor, or void containing PCSELs to be conducted and we find that the realisation of all semiconductor PCSELs covering a wide range of material and wavelengths are possible.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Ivanov, Dr Pavlo and Taylor, Dr Richard and Hogg, Professor Richard and Li, Guangrui and Childs, Dr David
Authors: Taylor, R.J.E., Ivanov, P., Li, G., Childs, D.T.D., and Hogg, R.A.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Optical and Quantum Electronics
ISSN (Online):1572-817X
Published Online:06 January 2017
Copyright Holders:Copyright © 2017 The Authors
First Published:First published in Optical and Quantum Electronics 49(2):47
Publisher Policy:Reproduced under a Creative Commons License

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