Fabrication of photonic crystals in rare-earth doped chalcogenide glass films for enhanced upconversion
Fabrication of photonic crystals in rare-earth doped chalcogenide glass films for enhanced upconversion
Gallium lanthanum oxysulfide (GLSO) is a promising host material for observing strong upconversion emission from trivalent rare-earth ions such as erbium (Er3+). Its attractive properties include high rare-earth solubility due to the lanthanum content of the glass former, a high refractive index (n = 2.2 at 550nm) for high radiative efficiency, and a low maximum phonon energy of approximately 425cm-1. Photonic crystals meanwhile can provide controlled light extraction, and may be capable of suppressing unwanted IR emission from lower lying metastable states. Here, we describe the fabrication of photonic crystals in annealed films of Er3+-doped GLSO deposited by RF sputtering. The most intense visible upconversion emission is observed in films annealed at 550°C, close to the bulk glass transition temperature. Hexagonal lattice photonic crystals are subsequently milled into the films using a focused ion beam (FIB). The milling parameters are optimized to produce the most vertical sidewall profile.
Pollard, M.E.
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Knight, K.J.
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Parker, G.J.
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Hewak, D.W.
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Charlton, M.D.B.
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Jiang, Shibin
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Digonnet, Michel J.F.
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Dries, J. Christopher
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Pollard, M.E.
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Knight, K.J.
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Parker, G.J.
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Hewak, D.W.
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Charlton, M.D.B.
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Jiang, Shibin
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Digonnet, Michel J.F.
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Dries, J. Christopher
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Pollard, M.E., Knight, K.J., Parker, G.J., Hewak, D.W. and Charlton, M.D.B.
(2012)
Fabrication of photonic crystals in rare-earth doped chalcogenide glass films for enhanced upconversion.
Jiang, Shibin, Digonnet, Michel J.F. and Dries, J. Christopher
(eds.)
Photonics West 2012, , San Francisco, United States.
21 - 26 Jan 2012.
(doi:10.1117/12.908014).
Record type:
Conference or Workshop Item
(Paper)
Abstract
Gallium lanthanum oxysulfide (GLSO) is a promising host material for observing strong upconversion emission from trivalent rare-earth ions such as erbium (Er3+). Its attractive properties include high rare-earth solubility due to the lanthanum content of the glass former, a high refractive index (n = 2.2 at 550nm) for high radiative efficiency, and a low maximum phonon energy of approximately 425cm-1. Photonic crystals meanwhile can provide controlled light extraction, and may be capable of suppressing unwanted IR emission from lower lying metastable states. Here, we describe the fabrication of photonic crystals in annealed films of Er3+-doped GLSO deposited by RF sputtering. The most intense visible upconversion emission is observed in films annealed at 550°C, close to the bulk glass transition temperature. Hexagonal lattice photonic crystals are subsequently milled into the films using a focused ion beam (FIB). The milling parameters are optimized to produce the most vertical sidewall profile.
More information
e-pub ahead of print date: 2012
Additional Information:
#8257
Venue - Dates:
Photonics West 2012, , San Francisco, United States, 2012-01-21 - 2012-01-26
Organisations:
Optoelectronics Research Centre, Electronics & Computer Science
Identifiers
Local EPrints ID: 336500
URI: http://eprints.soton.ac.uk/id/eprint/336500
PURE UUID: ba362e76-27ea-4c01-87d9-919f02d259fb
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Date deposited: 28 Mar 2012 13:35
Last modified: 14 Mar 2024 10:43
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Contributors
Author:
M.E. Pollard
Author:
K.J. Knight
Author:
G.J. Parker
Author:
M.D.B. Charlton
Editor:
Shibin Jiang
Editor:
Michel J.F. Digonnet
Editor:
J. Christopher Dries
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