Journal
OPTICS EXPRESS
Volume 15, Issue 20, Pages 12818-12833Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.15.012818
Keywords
-
Categories
Ask authors/readers for more resources
Multi-photon absorption and excitation properties of CdSe quantum dots in hexane with different dot-sizes have been investigated. The two- and three-photon absorption (2PA and 3PA) coefficients were measured by using similar to 160-fs laser pulses at wavelengths of similar to 775-nm and similar to 1300-nm, respectively. The dependence of one-, two- and three-photon induced fluorescence spectra as well as their double-exponential decay on the dot-sizes was studied. Based on the fluorescence emission spectra and temporal decay constants for a given sample solution excited by one-, two- and three- photon absorption, it can be concluded that the transition pathways for fluorescence emission and decay under one-, two- and three-photon excitation are nearly identical. The optical power limiting capabilities based on 2PA and 3PA mechanisms are demonstrated separately. In addition, a saturation behavior of 3PA at similar to 1300-nm was observed. (c) 2007 Optical Society of America.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available