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

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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
Depositing User: Ms Neetu Chandra
Date Deposited: 14 Jan 2013 12:23
Last Modified: 14 Jan 2013 12:23

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