Comparative features of optical limiting in monolayer protected gold, silver and alloy nanoclusters under picosecond and nanosecond laser excitation

Philip, Reji; Majumdar, Sushil; Ramachandran, Hema; Ravindra Kumar, G.; Sandhyarani, N.; Pradeep, T.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/3156

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DC Field	Value	Language
dc.contributor.author	Philip, Reji	-
dc.contributor.author	Majumdar, Sushil	-
dc.contributor.author	Ramachandran, Hema	-
dc.contributor.author	Ravindra Kumar, G.	-
dc.contributor.author	Sandhyarani, N.	-
dc.contributor.author	Pradeep, T.	-
dc.date.accessioned	2007-06-26T11:10:48Z	-
dc.date.available	2007-06-26T11:10:48Z	-
dc.date.issued	2001	-
dc.identifier.citation	Nonlinear Optics, 2001, Vol.27, p357-365	en
dc.identifier.issn	1058-7268	-
dc.identifier.uri	http://hdl.handle.net/2289/3156	-
dc.description	Restricted Access.	en
dc.description.abstract	Au, Ag and Au:Ag alloy nanoclusters have been synthesized with an average core size of 3 - 4 nm. Octanethiol and octadecanethiol are used as capping agents. Strong optical limiting is exhibited by these samples when excited by 532 nm pulses of both 35 ps and 7 ns duration. It is found that some of these samples can behave as saturable absorbers also, provided certain input intensity conditions are fulfilled. For all the samples studied, the limiting efficiency is found to be consistently better with ns excitation. Similarly, octanethiol capped clusters are found to be better limiters than octadecanethiol capped clusters. In addition, it is seen that the alloy clusters are less efficient in limiting and are less photostable than their monometal counterparts. It is possible to explain the observed effects in terms of the electron dynamics of the excited state species.	en
dc.format.extent	503915 bytes	-
dc.format.mimetype	application/pdf	-
dc.language.iso	en	en
dc.publisher	Taylor & Francis	en
dc.rights	2001 Taylor & Francis	en
dc.title	Comparative features of optical limiting in monolayer protected gold, silver and alloy nanoclusters under picosecond and nanosecond laser excitation	en
dc.type	Article	en
Appears in Collections:	Research Papers (LAMP)

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