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Title: Sol–gel prepared Cu2O microspheres: linear and nonlinear optical properties
Authors: Karthikeyan, B.
Udayabhaskar, R.
Rose, Priya
Pandiyarajan, T.
Philip, Reji
Keywords: 12months
Issue Date: Aug-2014
Publisher: Royal Society of Chemistry
Citation: RSC Advance, 2014, Vol. 4, p39541-39546
Abstract: We report the simple sol–gel based synthesis of size-tunable monodispersed crystalline Cu2O microspheres (CMS) and the measurement of their linear and nonlinear optical properties. Optical absorption spectra show a broad plasmonic absorption band extending from 350 to 1100 nm in general agreement with calculations based on Mie theory, despite the relatively large micron size of the particles. Z-scan measurements (532 nm, 5 ns pulses) reveal that Cu2O microspheres are efficient optical limiters, comparable in strength to nanocarbons and metal/semiconductor nanoparticles. The effective two-photon absorption coefficients are numerically calculated from measured data. These can be tuned systematically by varying the particle size.
Description: Restricted Access.
ISSN: 2046-2069 (Online)
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Copyright: 2014 Royal Society of Chemistry
Appears in Collections:Research Papers (LAMP)

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