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Title: Continuous-wave two-photon excitation of individual CdS nanocrystallites

Abstract

By use of low-temperature confocal microscopy, continuous-wave two-photon fluorescence images are obtained of individual CdS nanocrystallites embedded in a polymer matrix. The quadratic dependence of the emission rate on the applied laser power proves that the observed fluorescence originates from the simultaneous absorption of two photons. From the experimental data the two-photon absorption cross-section {sigma}{sup (2)} could be determined, resulting in a value smaller than that known from literature. The work presented is a first step towards high-resolution fluorescence-excitation spectroscopy on the electronic states in the band edge, inaccessible by conventional one-photon spectroscopy. {copyright} 2001 American Institute of Physics.

Authors:
; ; ; ; ;
Publication Date:
Sponsoring Org.:
(US)
OSTI Identifier:
40230719
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 79; Journal Issue: 6; Other Information: DOI: 10.1063/1.1391231; Othernumber: APPLAB000079000006000830000001; 022132APL; PBD: 6 Aug 2001; Journal ID: ISSN 0003-6951
Publisher:
The American Physical Society
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ABSORPTION; EXCITATION; FLUORESCENCE; LASERS; MICROSCOPY; PHOTONS; PHYSICS; POLYMERS; SPECTROSCOPY

Citation Formats

van Oijen, A M, Verberk, R, Durand, Y, Schmidt, J, van Lingen, J. N. J., Bol, A A, and Meijerink, A. Continuous-wave two-photon excitation of individual CdS nanocrystallites. United States: N. p., 2001. Web. doi:10.1063/1.1391231.
van Oijen, A M, Verberk, R, Durand, Y, Schmidt, J, van Lingen, J. N. J., Bol, A A, & Meijerink, A. Continuous-wave two-photon excitation of individual CdS nanocrystallites. United States. doi:10.1063/1.1391231.
van Oijen, A M, Verberk, R, Durand, Y, Schmidt, J, van Lingen, J. N. J., Bol, A A, and Meijerink, A. Mon . "Continuous-wave two-photon excitation of individual CdS nanocrystallites". United States. doi:10.1063/1.1391231.
@article{osti_40230719,
title = {Continuous-wave two-photon excitation of individual CdS nanocrystallites},
author = {van Oijen, A M and Verberk, R and Durand, Y and Schmidt, J and van Lingen, J. N. J. and Bol, A A and Meijerink, A},
abstractNote = {By use of low-temperature confocal microscopy, continuous-wave two-photon fluorescence images are obtained of individual CdS nanocrystallites embedded in a polymer matrix. The quadratic dependence of the emission rate on the applied laser power proves that the observed fluorescence originates from the simultaneous absorption of two photons. From the experimental data the two-photon absorption cross-section {sigma}{sup (2)} could be determined, resulting in a value smaller than that known from literature. The work presented is a first step towards high-resolution fluorescence-excitation spectroscopy on the electronic states in the band edge, inaccessible by conventional one-photon spectroscopy. {copyright} 2001 American Institute of Physics.},
doi = {10.1063/1.1391231},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 6,
volume = 79,
place = {United States},
year = {2001},
month = {8}
}