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High second-order optical nonlinearities in thermally poled sol-gel silica

High second-order optical nonlinearities in thermally poled sol-gel silica
High second-order optical nonlinearities in thermally poled sol-gel silica
Silica glass samples prepared by a sol-gel process, the mixture of silica sol for gelation and colloidal silica particles, have been thermally poled in vacuum by continuous high voltage (8-12 kV) at elevated temperature (280°C). High second-order nonlinearities (>1pm/V), located under the anodic surface, have been measured and the values are higher than those obtained in fixed silica glass, poled under the same conditions. A model for thermal poling is suggested which explains the experimental results in sol-gel silica and the difference between thermal poling of sol-gel and fused silica. The granular structure and the boundaries of sol-gel silica seem to play a major role in establishing the electrical properties of the depletion layer during and after poling.
0003-6951
2578-[3pp]
Pruneri, V.
0e97eb94-b682-409f-a107-ae6b84763f02
Bonfrate, G.
8bc08494-13f7-48f8-b630-f283d6ffd6d5
Kazansky, P.G.
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Takebe, H.
7dbc1b40-b524-47b8-a478-2808dd167844
Morinaga, K.
35e9eb13-61bf-4161-ba9b-ad7634e9341c
Kohno, M.
5ccdba81-3aa6-446e-8e4c-37ccc9500121
Kuwasaki, K.
9aeec641-e4d3-4466-ad1f-88e9fe83d70c
Takeuchi, T.
02ba76eb-a818-4e57-87f4-b5d268d13d1c
Pruneri, V.
0e97eb94-b682-409f-a107-ae6b84763f02
Bonfrate, G.
8bc08494-13f7-48f8-b630-f283d6ffd6d5
Kazansky, P.G.
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Takebe, H.
7dbc1b40-b524-47b8-a478-2808dd167844
Morinaga, K.
35e9eb13-61bf-4161-ba9b-ad7634e9341c
Kohno, M.
5ccdba81-3aa6-446e-8e4c-37ccc9500121
Kuwasaki, K.
9aeec641-e4d3-4466-ad1f-88e9fe83d70c
Takeuchi, T.
02ba76eb-a818-4e57-87f4-b5d268d13d1c

Pruneri, V., Bonfrate, G., Kazansky, P.G., Takebe, H., Morinaga, K., Kohno, M., Kuwasaki, K. and Takeuchi, T. (1999) High second-order optical nonlinearities in thermally poled sol-gel silica. Applied Physics Letters, 74 (18), 2578-[3pp]. (doi:10.1063/1.123903).

Record type: Article

Abstract

Silica glass samples prepared by a sol-gel process, the mixture of silica sol for gelation and colloidal silica particles, have been thermally poled in vacuum by continuous high voltage (8-12 kV) at elevated temperature (280°C). High second-order nonlinearities (>1pm/V), located under the anodic surface, have been measured and the values are higher than those obtained in fixed silica glass, poled under the same conditions. A model for thermal poling is suggested which explains the experimental results in sol-gel silica and the difference between thermal poling of sol-gel and fused silica. The granular structure and the boundaries of sol-gel silica seem to play a major role in establishing the electrical properties of the depletion layer during and after poling.

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Published date: May 1999

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Local EPrints ID: 77825
URI: http://eprints.soton.ac.uk/id/eprint/77825
ISSN: 0003-6951
PURE UUID: 6867a28c-7dcf-49c9-9e38-eed757034c48

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Date deposited: 11 Mar 2010
Last modified: 09 Jul 2021 16:35

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Contributors

Author: V. Pruneri
Author: G. Bonfrate
Author: P.G. Kazansky
Author: H. Takebe
Author: K. Morinaga
Author: M. Kohno
Author: K. Kuwasaki
Author: T. Takeuchi

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