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Electrical conduction processes and high electric field poling in nonlinear optical polymers

Eich, Manfred (1996)
Electrical conduction processes and high electric field poling in nonlinear optical polymers.
SPIE'S 1996 INTERNATIONAL SYMPOSIUM ON OPTICAL SCIENCE, ENGINEERING, AND INSTRUMENTATION. Denver, CO, United States (04.08.1996-09.08.1996)
doi: 10.1117/12.256160
Conference or Workshop Item, Bibliographie

Abstract

We report on electrical conduction phenomena occurring during high electric field electrode poling of side chain (chi) (2) polymers. Electric current and second harmonic intensity were measured simultaneously in poling experiments performed on samples with and without an additional inorganic poly-methyl-siloxane layer. Current densities appeared to be limited by a Bardeen-type potential barrier at the electrode/insulator interface. The field dependence of current density was found to be Schottky charge injection for medium field strengths (EPOL <EQ 100 V/micrometers ) whereas it was dominated by Fowler-Nordheim tunneling at higher poling fields. In the presence of the buffer layer, a significant suppression of tunneling was observed which leads to a reduced probability of singular breakdown events and shifted the limit of avalanche dielectric breakdown to higher internal effective poling fields.

Item Type: Conference or Workshop Item
Erschienen: 1996
Creators: Eich, Manfred
Type of entry: Bibliographie
Title: Electrical conduction processes and high electric field poling in nonlinear optical polymers
Language: English
Date: 1996
Place of Publication: Bellingham, WA USA
Publisher: Spie
Series: SPIE (Society for Photo-Optical Instrumentation Engineers) Proceedings
Series Volume: 2852
Event Title: SPIE'S 1996 INTERNATIONAL SYMPOSIUM ON OPTICAL SCIENCE, ENGINEERING, AND INSTRUMENTATION
Event Location: Denver, CO, United States
Event Dates: 04.08.1996-09.08.1996
DOI: 10.1117/12.256160
Abstract:

We report on electrical conduction phenomena occurring during high electric field electrode poling of side chain (chi) (2) polymers. Electric current and second harmonic intensity were measured simultaneously in poling experiments performed on samples with and without an additional inorganic poly-methyl-siloxane layer. Current densities appeared to be limited by a Bardeen-type potential barrier at the electrode/insulator interface. The field dependence of current density was found to be Schottky charge injection for medium field strengths (EPOL <EQ 100 V/micrometers ) whereas it was dominated by Fowler-Nordheim tunneling at higher poling fields. In the presence of the buffer layer, a significant suppression of tunneling was observed which leads to a reduced probability of singular breakdown events and shifted the limit of avalanche dielectric breakdown to higher internal effective poling fields.

Divisions: 05 Department of Physics
Date Deposited: 19 Nov 2008 15:59
Last Modified: 18 Oct 2024 08:35
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