Modelling of photonic wire Bragg Gratings
Modelling of photonic wire Bragg Gratings
Some important properties of photonic wire Bragg grating structures have been investigate. The design, obtained as a generalisation of the full-width gap grating, has been modelled using 3D finite-difference time-domain simulations. Different types of stop-band have been observed. The impact of the grating geometry on the lowest order (longest wavelength) stop-band has been investigated - and has identified deeply indented configurations where reduction of the stop-bandwidth and of the reflectivity occurred. Our computational results have been substantially validated by an experimental demonstration of the fundamental stop-band of photonic wire Bragg gratings fabricated on silicon-on-insulator material. The accuracy of two distinct 2D computational models based on the effective index method has also been studied - because of their inherently much greater rapidity and consequent utility for approximate initial designs. A 2D plan-view model has been found to reproduce a large part of the essential features of the spectral response of full 3D models.
finite-difference time-domain, optical waveguide modelling, photonic crystal, photonic wire, silicon on insulator, waveguide grating
133-148
Gnan, M
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Bellanca, G
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Chong, H M H
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Bassi, P
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De La Rue, R M
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2006
Gnan, M
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Bellanca, G
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Chong, H M H
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Bassi, P
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De La Rue, R M
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Gnan, M, Bellanca, G, Chong, H M H, Bassi, P and De La Rue, R M
(2006)
Modelling of photonic wire Bragg Gratings.
Optical and Quantum Electronics, 38 (1-3), .
(doi:10.1007/s11082-006-0010-0).
Abstract
Some important properties of photonic wire Bragg grating structures have been investigate. The design, obtained as a generalisation of the full-width gap grating, has been modelled using 3D finite-difference time-domain simulations. Different types of stop-band have been observed. The impact of the grating geometry on the lowest order (longest wavelength) stop-band has been investigated - and has identified deeply indented configurations where reduction of the stop-bandwidth and of the reflectivity occurred. Our computational results have been substantially validated by an experimental demonstration of the fundamental stop-band of photonic wire Bragg gratings fabricated on silicon-on-insulator material. The accuracy of two distinct 2D computational models based on the effective index method has also been studied - because of their inherently much greater rapidity and consequent utility for approximate initial designs. A 2D plan-view model has been found to reproduce a large part of the essential features of the spectral response of full 3D models.
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MODELLING_OF_PHOTONIC_WIRE_BRAGG_GRATINGS_2006.pdf
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Published date: 2006
Keywords:
finite-difference time-domain, optical waveguide modelling, photonic crystal, photonic wire, silicon on insulator, waveguide grating
Organisations:
Nanoelectronics and Nanotechnology
Identifiers
Local EPrints ID: 264899
URI: http://eprints.soton.ac.uk/id/eprint/264899
ISSN: 0306-8919
PURE UUID: 95426488-849b-41ec-834d-6a73d8ef2056
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Date deposited: 27 Nov 2007 10:01
Last modified: 15 Mar 2024 03:30
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Contributors
Author:
M Gnan
Author:
G Bellanca
Author:
H M H Chong
Author:
P Bassi
Author:
R M De La Rue
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