Title :
Ultrafast supercontinuum spectroscopy of multiple exciton states in lead chalcogenide nanorods and nanocrystals
Author :
Gesuele, F. ; Sfeir, M.Y. ; Koh, W.-K. ; Murray, C.B. ; Heinz, T.F. ; Wong, C.W.
Author_Institution :
Opt. Nanostruct. Lab., Columbia Univ., New York, NY, USA
Abstract :
We examine the multiple exciton population dynamics in lead chalcogenide nanostructures by ultrafast supercontinuum transient absorption. Carrier multiplication is revealed in the limit of low absorbed photon number, along with biexciton dynamics.
Keywords :
IV-VI semiconductors; biexcitons; high-speed optical techniques; lead compounds; nanorods; ultraviolet spectra; visible spectra; PbSe; biexciton dynamics; carrier multiplication; lead chalcogenide nanocrystals; lead chalcogenide nanorods; low absorbed photon number; multiple exciton population dynamics; multiple exciton states; ultrafast supercontinuum spectroscopy; ultrafast supercontinuum transient absorption; ultraviolet-visible spectra; Absorption; Excitons; Nanocrystals; Radiative recombination; Spectroscopy; Transient analysis;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2012 Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4673-1839-6
