Optical coupling between a self-assembled microsphere grating and a rib waveguide
Optical coupling between a self-assembled microsphere grating and a rib waveguide
We report the fabrication of a linear array of self-assembled polystyrene microspheres side-coupled to a rib waveguide. The optical coupling between the lateral evanescent field and the periodically perturbed effective refractive index alongside the waveguide results in a transmission stopband at the Bragg wavelength.
The observed transmission spectrum shows a notch centered at λ = 1590nm, which is in close agreement with theory. The coupling coefficient, K, and the spectral response are derived for variable cladding medium index using perturbation theory. Structures of this type are expected to find application in wavelength selection, optical sensing, and optical delays.
3513-3515
Tai, Chao-Yi
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Unal, Bayram
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Wilkinson, James S.
73483cf3-d9f2-4688-9b09-1c84257884ca
Ghanem, Mohamed A.
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Bartlett, Philip N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
23 April 2004
Tai, Chao-Yi
5a9a315c-4db0-4809-984f-857a4210ebde
Unal, Bayram
0532f723-1540-442d-b852-64bd102d401c
Wilkinson, James S.
73483cf3-d9f2-4688-9b09-1c84257884ca
Ghanem, Mohamed A.
cef6c814-2709-4a2f-a052-06d28d0ba04c
Bartlett, Philip N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
Tai, Chao-Yi, Unal, Bayram, Wilkinson, James S., Ghanem, Mohamed A. and Bartlett, Philip N.
(2004)
Optical coupling between a self-assembled microsphere grating and a rib waveguide.
Applied Physics Letters, 84 (18), .
(doi:10.1063/1.1739275).
Abstract
We report the fabrication of a linear array of self-assembled polystyrene microspheres side-coupled to a rib waveguide. The optical coupling between the lateral evanescent field and the periodically perturbed effective refractive index alongside the waveguide results in a transmission stopband at the Bragg wavelength.
The observed transmission spectrum shows a notch centered at λ = 1590nm, which is in close agreement with theory. The coupling coefficient, K, and the spectral response are derived for variable cladding medium index using perturbation theory. Structures of this type are expected to find application in wavelength selection, optical sensing, and optical delays.
Text
2862
- Author's Original
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Published date: 23 April 2004
Identifiers
Local EPrints ID: 30225
URI: http://eprints.soton.ac.uk/id/eprint/30225
ISSN: 0003-6951
PURE UUID: 8aba4a11-7a53-42b9-9d6f-1e0bc5cd3862
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Date deposited: 11 May 2006
Last modified: 16 Mar 2024 02:42
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Author:
Chao-Yi Tai
Author:
Bayram Unal
Author:
Mohamed A. Ghanem
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