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Titolo:
Photorefractive liquid crystals
Autore:
Wiederrecht, GP;
Indirizzi:
Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA Argonne Natl Lab Argonne IL USA 60439 ab, Div Chem, Argonne, IL 60439 USA
Titolo Testata:
ANNUAL REVIEW OF MATERIALS RESEARCH
, volume: 31, anno: 2001,
pagine: 139 - 169
SICI:
1531-7331(2001)31:<139:PLC>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
HOLOGRAPHIC GRATING FORMATION; HIGH-MOLAR-MASS; PHOTOINDUCED ELECTRON-TRANSFER; GLASS-TRANSITION TEMPERATURE; OPTICAL-PHASE CONJUGATION; RADICAL-ION PAIRS; MESOGENIC COMPOSITES; ACCEPTOR MOLECULES; RESPONSE CHARACTERISTICS; CHARGE SEPARATION;
Keywords:
liquid crystal composites; photo-induced charge separation; gratings; holography; optical materials;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
98
Recensione:
Indirizzi per estratti:
Indirizzo: Wiederrecht, GP Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA Argonne Natl Lab 9700 S Cass Ave Argonne IL USA 60439 USA
Citazione:
G.P. Wiederrecht, "Photorefractive liquid crystals", ANN REV M R, 31, 2001, pp. 139-169

Abstract

A review of the field of photorefractive liquid crystals is presented. Thefirst reports of photorefractive liquid crystals occurred in 1994, and theperformance of these materials has dramatically improved since that time. Liquid crystalline materials have proven to be highly versatile, showing photorefractive character under a wide range of conditions. For example, new composites based on high-molar-mass liquid crystals are now capable of forming volume (Bragg) gratings with high photorefractive gain coefficients of > 600 cm(-1). Formation times for photorefractive Bragg gratings of 15 ms with applied fields of only 0.1 V/mum have been reported. Low-molar-mass liquid crystals continue to be developed and show their largest photorefractive character in the thin (Raman-Nath) grating regime. Composites of nonmesogenic polymers and liquid crystals are also discussed. The experiments and theoretical work that have been used to characterize these materials are reviewed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 20:03:26