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Proceedings Paper

Electro-optical properties of an epoxy-based polymer-dispersed liquid crystal
Author(s): Pasquale Mormile; Lucia Petti; Mario Abbate; Pellegrino Musto; Giuseppe Ragosta; Werner J. Blau
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Paper Abstract

Electro-optical properties of an epoxy-based polymer dispersed liquid crystal (PDLC) have been investigated. A morphological analysis has been performed by optical microscopy in order to estimate initially the average diameter of the liquid crystal microdroplets dispersed in the polymeric matrix. We present the observation of an electro-optical switching effect from an opaque to a transparent state occurring at a threshold value of the applied field in a PDLC. Optical responses of the composite film under the conditions of an externally applied ac electric field and a film thickness of 50μm, were determined using an Argon laser. The experimental result showed promising switching times with a rise time of 200 μsec and a decay time of 2.2 msec and an exceptionally high contrast ratio up to 410. These result demonstrate the validity of employing this new PDLC in electro-optical devices.

Paper Details

Date Published: 12 November 1999
PDF: 7 pages
Proc. SPIE 3896, Design, Fabrication, and Characterization of Photonic Devices, (12 November 1999); doi: 10.1117/12.370386
Show Author Affiliations
Pasquale Mormile, Istituto di Cibernetica (Italy)
Lucia Petti, Istituto di Cibernetica (Italy) and Trinity College (Italy)
Mario Abbate, Istituto di Ricerca e Tecnologia delle Materie Plastiche (Italy)
Pellegrino Musto, Istituto di Ricerca e Tecnologia delle Materie Plastiche (Italy)
Giuseppe Ragosta, Istituto di Ricerca e Tecnologia delle Materie Plastiche (Italy)
Werner J. Blau, Trinity College (Ireland)


Published in SPIE Proceedings Vol. 3896:
Design, Fabrication, and Characterization of Photonic Devices
Marek Osinski; Soo-Jin Chua; Shigefusa F. Chichibu, Editor(s)

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