Ultrafast optical nonlinearity in nanostructured selenium allotropes

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/5927

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DC Field	Value	Language
dc.contributor.author	Ann Mary, K.A.	-
dc.contributor.author	Unnikrishnan, N.V.	-
dc.contributor.author	Philip, Reji	-
dc.date.accessioned	2014-07-22T06:22:59Z	-
dc.date.available	2014-07-22T06:22:59Z	-
dc.date.issued	2013-11-19	-
dc.identifier.citation	Chemical Physics Letters, 2013, Vol.588, p136-140	en
dc.identifier.issn	0009-2614	-
dc.identifier.uri	http://hdl.handle.net/2289/5927	-
dc.description	Restricted Access.	en
dc.description.abstract	In this letter we investigate nonlinear optical properties of amorphous selenium (a-Se) nanoparticles and trigonal selenium (t-Se) nanowires using the open aperture Z-scan, employing 100 fs and 5 ns laser pulses, at 800 nm and 532 nm, respectively. In the former case (ultrafast excitation) optical nonlinearity arises largely from absorption saturation and three-photon absorption, whereas in the latter (short-pulse excitation) it occurs mostly due to excited state absorption. Nonlinearity parameters for both regimes have been numerically evaluated from experimental data. Both allotropes are found to be efficient optical limiters, particularly for short-pulse excitation, with potential applications in laser safety devices	en
dc.language.iso	en	en
dc.publisher	Elsevier B.V	en
dc.relation.uri	http://dx.doi.org/10.1016/j.cplett.2013.09.069	en
dc.rights	2013 Elesvier B.V.	en
dc.title	Ultrafast optical nonlinearity in nanostructured selenium allotropes	en
dc.type	Article	en
Appears in Collections:	Research Papers (LAMP)

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