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Title: Plasmonic, low-frequency Raman, and nonlinear optical-limiting studies in copper-silica nanocomposites
Authors: Satyabrata, Mohapatra
Mishra, Y.K.
Warrier, A.M.
Philip, Reji
Sahoo, S.
Arora, A.K.
Avasthi, D.K.
Keywords: Plasmonic nanocomposites
Nonlinear absorption
Optical limiting
Surface plasmon resonance
Issue Date: Mar-2012
Publisher: Springer
Citation: Plasmonics, 2012, Vol. 7, p25-31
Abstract: Nanocomposite thin films consisting of Cu nanoparticles embedded in silica matrix were synthesized by atom beam co-sputtering technique. Plasmonic, optical, and structural properties of the nanocomposite films were investigated by using ultraviolet (UV)-visible absorption spectroscopy, nonlinear optical transmission, X-ray diffraction (XRD), and low-frequency Raman scattering. UV-visible absorption studies revealed the surface plasmon resonance absorption at 564 nm which showed a red shift with increase in Cu fraction. XRD results together with surface plasmon resonance absorption confirmed the presence of Cu nanoparticles of different size. Low-frequency Raman studies of nanocomposite films revealed breathing modes in Cu nanoparticles. Nanocomposites with lower metal fractions were found to behave like optical limiters. The possibility of controllably tuning the optical nonlinearity of these nanocomposites could enable them to be the potential candidates for applications in nanophotonics.
Description: Restricted Access.
ISSN: 1557-1955
1557-1963 -(Online)
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Copyright: 2011 Springer Science Business Media, LLC
Appears in Collections:Research Papers (LAMP)

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