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Please use this identifier to cite or link to this item: http://dyuthi.cusat.ac.in/purl/2596

Title: Nonlinear optical absorption in silver nanosol
Authors: Unnikrishnan, K P
Nampoori, V P N
Ramakrishnan, V
Umadevi, M
Vallabhan, C P G
Technology
Keywords: silver nanosol
reverse saturable absorption (RSA)
saturable absorption (SA)
Issue Date: 2003
Publisher: Institute of Physics Publishing
Abstract: Nonlinear optical absorption in silver nanosol was investigated at selected wavelengths (456 nm, 477 nm and 532 nm) using open aperture Z-scan technique. It was observed that nature of nonlinear absorption is sensitively dependent on input fluence as well as on excitation wavelength. Besides, the present sample was found to exhibit reverse saturable absorption (RSA) and saturable absorption (SA) at these wavelengths depending on excitation fluence. RSA is attributed to enhanced absorption resulting from photochemical changes. SA observed for fluence values lower and higher than those corresponding to RSA are, respectively, attributed to plasmon bleach and saturation of RSA.
URI: http://dyuthi.cusat.ac.in/purl/2596
Appears in Collections:Dr. V P N Nampoori

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