Two-photon-assisted excited state absorption in nanocomposite films of PbS stabilized in a synthetic glue matrix

Kurian, Pushpa Ann; Vijayan, C.; Suchand Sandeep, C.S.; Philip, Reji; Sathiyamoorthy, K.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/2110

Full metadata record

DC Field	Value	Language
dc.contributor.author	Kurian, Pushpa Ann	-
dc.contributor.author	Vijayan, C.	-
dc.contributor.author	Suchand Sandeep, C.S.	-
dc.contributor.author	Philip, Reji	-
dc.contributor.author	Sathiyamoorthy, K.	-
dc.date.accessioned	2007-02-08T09:13:15Z	-
dc.date.available	2007-02-08T09:13:15Z	-
dc.date.issued	2007-02-21	-
dc.identifier.citation	Nanotechnology, 2007, Vol.18, p075708	en
dc.identifier.issn	0957-4484	-
dc.identifier.issn	1361-6528 (Online)	-
dc.identifier.uri	http://hdl.handle.net/2289/2110	-
dc.description	Restricted Access.	en
dc.description.abstract	Strong nonlinear absorption is observed in nanocomposite films containing PbS nanocrystals of mean size of 3.3 nm stabilized in a commercial poly(vinyl acetate) glue by a novel and simple chemical route of synthesis. A significant blueshift of the optical absorption edge indicates strong quantum confinement. The mean nanocrystal size was characterized by x-ray diffraction and transmission electron microscopy. The surface structure of nanocrystals is analysed using infrared spectroscopy. The excitonic transitions are probed by photoacoustic spectroscopy and the results are analysed on the basis of theoretical calculations using envelope function formalism. Results of open aperture z-scan experiments suggest a model involving saturable absorption followed by two-photon absorption at a lower concentration while the data for a higher concentration fitted saturable absorption followed by three-photon absorption. Free carrier absorption due to two-photon-assisted excited state absorption appears to be the predominant mechanism of optical nonlinearity.	en
dc.format.extent	698073 bytes	-
dc.format.mimetype	application/pdf	-
dc.language.iso	en	en
dc.publisher	IOP Publishing Ltd	en
dc.relation.uri	http://dx.doi.org/10.1088/0957-4484/18/7/075708	en
dc.rights	2007 IOP Publishing Ltd.	en
dc.title	Two-photon-assisted excited state absorption in nanocomposite films of PbS stabilized in a synthetic glue matrix	en
dc.type	Article	en
Appears in Collections:	Research Papers (LAMP)

Files in This Item:

File	Description	Size	Format
2007 Nanotechnology v18 p075708.pdf Restricted Access	Restricted Access	681.71 kB	Adobe PDF	View/Open Request a copy

Show simple item record