Free-surface effects on the response of nematic liquid crystal films to a laser pulse

Autor:	Shyu-Mou Chen, Hung-Yu Yang, Ru-Pin Pan
Rok vydání:	1993
Předmět:	Materials science Fréedericksz transition business.industry General Chemistry Condensed Matter Physics Laser Polarization (waves) Molecular physics Free surface effect law.invention Magnetic field Optics law Liquid crystal Free surface Perpendicular General Materials Science business
Zdroj:	Liquid Crystals. 14:1561-1571
ISSN:	1366-5855 0267-8292
DOI:	10.1080/02678299308026468
Popis:	The dynamic response of 5CB films with a free surface to a laser pulse is investigated. A magnetic field above the Freedericksz transition is applied initially to induce a starting angle on the molecular orientation. A single 1·06 μm laser pulse with e −1 pulse width 0·2 ms is incident normally upon the films. When the laser pulse polarization is perpendicular to the magnetic field, only a thermal effect is involved. While it is parallel to the magnetic field, both molecular orientation and thermal effects are involved. The results from films with a free surface are compared with those from films sandwiched between two glass substrates. The free surface effect, beam size effect, and thermal effect are discussed by comparing with theoretical analysis.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::795a750dcbb5edff2966ac0ead2cc910 https://doi.org/10.1080/02678299308026468 Zobrazit plný text záznamu