Fabrication and optical characterisation of a photonic crystal integrated into a luminescent Si-rich silicon-dioxide waveguide
Fabrication and optical characterisation of a photonic crystal integrated into a luminescent Si-rich silicon-dioxide waveguide
This thesis concerns the melding of two research areas: that of light emitting silicon devices based upon silicon nanocrystals, and that of photonic crystals (PCs). The focus has primarily been working towards using photonic crystals as a method of controlling the photoluminescence emission spectrum from the silicon nanocrystals.
A method was developed for the fabrication of waveguides with a core layer of silicon-rich silicon dioxide (SRSO) which exhibited photoluminescence in the wavelength range from 600-1 l00nm when annealed. Ultrabroadband transmission measurements showed that while unannealed and optically quiescent SRSO waveguides had good optical transmission in the visible region, annealed waveguides were strongly absorbent below a wavelength of 700nm. Other studies also showed that the SRSO photoluminescence intensity was increased by increasing the duration of the thermal anneal stage, and that the wavelength of peak intensity could be shifted by modifying the incorporation of silicon into the SRSO layer. To explain the results obtained, several theories were advanced on the material properties of SRSO.
Once the SRSO waveguides were well characterised, they were patterned with 2D triangular lattice PCs. A laser was used to excite photoluminescence from the core region, and was measured having passed through the photonic crystal. When viewed through the photonic crystal, a strong modification of the transmitted photoluminescence spectrum was recorded. Plane wave and Finite Difference Time Domain simulations were used to identify individual higher order photonic bands in the observed spectra.
This work paves the way for the use of 2D photonic crystals as an integrated way of tailoring the propagation and group velocity dispersion of SRSO core photoluminescence through a waveguide structure, with potential applications in future integrated PC-based optical circuitry.
University of Southampton
Neal, Rebecca Tarn
ff3c625d-4baa-4bb3-beaa-b743b31bb583
2004
Neal, Rebecca Tarn
ff3c625d-4baa-4bb3-beaa-b743b31bb583
Neal, Rebecca Tarn
(2004)
Fabrication and optical characterisation of a photonic crystal integrated into a luminescent Si-rich silicon-dioxide waveguide.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
This thesis concerns the melding of two research areas: that of light emitting silicon devices based upon silicon nanocrystals, and that of photonic crystals (PCs). The focus has primarily been working towards using photonic crystals as a method of controlling the photoluminescence emission spectrum from the silicon nanocrystals.
A method was developed for the fabrication of waveguides with a core layer of silicon-rich silicon dioxide (SRSO) which exhibited photoluminescence in the wavelength range from 600-1 l00nm when annealed. Ultrabroadband transmission measurements showed that while unannealed and optically quiescent SRSO waveguides had good optical transmission in the visible region, annealed waveguides were strongly absorbent below a wavelength of 700nm. Other studies also showed that the SRSO photoluminescence intensity was increased by increasing the duration of the thermal anneal stage, and that the wavelength of peak intensity could be shifted by modifying the incorporation of silicon into the SRSO layer. To explain the results obtained, several theories were advanced on the material properties of SRSO.
Once the SRSO waveguides were well characterised, they were patterned with 2D triangular lattice PCs. A laser was used to excite photoluminescence from the core region, and was measured having passed through the photonic crystal. When viewed through the photonic crystal, a strong modification of the transmitted photoluminescence spectrum was recorded. Plane wave and Finite Difference Time Domain simulations were used to identify individual higher order photonic bands in the observed spectra.
This work paves the way for the use of 2D photonic crystals as an integrated way of tailoring the propagation and group velocity dispersion of SRSO core photoluminescence through a waveguide structure, with potential applications in future integrated PC-based optical circuitry.
Text
973528.pdf
- Version of Record
More information
Published date: 2004
Identifiers
Local EPrints ID: 465559
URI: http://eprints.soton.ac.uk/id/eprint/465559
PURE UUID: f3b5d9ff-2f38-4fdd-a954-ff2732afe9a1
Catalogue record
Date deposited: 05 Jul 2022 01:46
Last modified: 16 Mar 2024 20:15
Export record
Contributors
Author:
Rebecca Tarn Neal
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics