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Proceedings Paper

Pulse duration dependence of the third order optical nonlinearity of a cadmium sulfide dendrimer nanocomposite
Author(s): Roger Dorsinville; Valeria Balogh-Nair; Michael Etienne; Mary Potasek; A. Walser
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Paper Abstract

Open and close aperture Z-scans were performed on various CdS quantum dots embedded in either generation 4 (G4) and G5 poly(propyleneimine) dendrimer films using picosecond and femtosecond pulses between 350 nm and 1 &mgr;m. The films had an average thickness of 400nm. The measured values of the third order nonlinear coefficient were among the highest off-resonance nonlinearities reported for organic and/or hybrid composites materials. However, the nonlinear response with picosecond pulses were about an order of magnitude higher than the femtosecond counterpart. We show that the nonlinear response in these materials is also a function of the dynamics of the excited states involved and that measurements of the nonlinear optical coefficient with pulses of different duration is directly correlated to the dynamics of the excited states.

Paper Details

Date Published: 8 February 2007
PDF: 7 pages
Proc. SPIE 6471, Ultrafast Phenomena in Semiconductors and Nanostructure Materials XI and Semiconductor Photodetectors IV, 647105 (8 February 2007); doi: 10.1117/12.703186
Show Author Affiliations
Roger Dorsinville, The City College of New York (United States)
Graduate Ctr. of CUNY (United States)
Valeria Balogh-Nair, The City College of New York (United States)
Graduate Ctr. of CUNY (United States)
Michael Etienne, The City College of New York (United States)
Graduate Ctr. of CUNY (United States)
Mary Potasek, The City College of New York (United States)
Graduate Ctr. of CUNY (United States)
A. Walser, The City College of New York (United States)
Graduate Ctr. of CUNY (United States)


Published in SPIE Proceedings Vol. 6471:
Ultrafast Phenomena in Semiconductors and Nanostructure Materials XI and Semiconductor Photodetectors IV
Marshall J. Cohen; Kong-Thon Tsen; Joseph P. Estrera; Jin-Joo Song, Editor(s)

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