Chawla, Santa and Karar, N. and Chander, Harish (2008) Brighter glow in ZnS nanocrystals with polarized light. Superlattices and Microstructures , 43 (2). pp. 132-140. ISSN 0749-6036

PDF - Published Version Restricted to Registered users only Download (972Kb) | Request a copy

Abstract

No known reports exist on luminescence enhancement under polarized light excitation. In this study, ZnS nanocrystals have been observed to produce brighter luminescence when excited by polarized light. ZnS:Mn bulk and nanocrystals have shown fivefold to tenfold increase in photoluminescence (PL) intensity when excited with linearly polarized light at 305 nm and 340 nm. Luminescence enhancement to a lesser degree was observed with linearly polarized light excitation for ZnS:Cu, Al and ZnS:Ag, Al nanocrystals. The observations suggest emission intensity dependence on the degree of anisotropy, which could be correlated mainly with the symmetry of the luminescence center and also to a lesser extent with nanoparticle shape asymmetry.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/S Elsevier B.V.
Uncontrolled Keywords:	Optical properties of nanocrystals; Photoluminescence; Polarized light; Luminescence enhancement
Subjects:	Physics
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	14 Jan 2013 12:23
Last Modified:	14 Jan 2013 12:23
URI:	http://npl.csircentral.net/id/eprint/949

Actions (login required)

View Item