Please use this identifier to cite or link to this item: https://doi.org/10.1021/jp205238q
Title: Three-photon absorption in seeded CdSe/CdS nanorod heterostructures
Authors: Xing, G.
Chakrabortty, S.
Ngiam, S.W.
Chan, Y. 
Sum, T.C.
Issue Date: 15-Sep-2011
Citation: Xing, G., Chakrabortty, S., Ngiam, S.W., Chan, Y., Sum, T.C. (2011-09-15). Three-photon absorption in seeded CdSe/CdS nanorod heterostructures. Journal of Physical Chemistry C 115 (36) : 17711-17716. ScholarBank@NUS Repository. https://doi.org/10.1021/jp205238q
Abstract: Size-dependent three-photon absorption (3PA) and three-photon-excited photoluminescence (PL) of CdSe/CdS nanorod heterostructures have been investigated using Z-scan and upconversion PL techniques with 150 fs laser pulses at 1300 nm. The PL from these rods shows clear cubic power dependence, and the 3PA cross section (σ3) was found to be as high as 1.5 × 10-75 cm6 s2 photon-2 for 39 nm long rods, which is 2-4 orders of magnitude larger than those previously reported for spherical semiconductor nanocrystals under ∼100 fs laser pulse excitation. Importantly, by exploiting the unique property of the seeded nanorods to exhibit strong quantum confinement even at relatively large rod sizes, a superlinear dependence of the 3PA cross section on nanoparticle volume was found and validated over a wide volume range. A simple derived relation that quantitatively describes σ3 and takes into account the laser pulse duration is proposed, thereby providing a clear basis of comparison between the σ3 values of various II-VI semiconductor nanomaterials and facilitating a more judicious choice of their use in 3PA applications. © 2011 American Chemical Society.
Source Title: Journal of Physical Chemistry C
URI: http://scholarbank.nus.edu.sg/handle/10635/95315
ISSN: 19327447
DOI: 10.1021/jp205238q
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

22
checked on Nov 6, 2018

WEB OF SCIENCETM
Citations

21
checked on Oct 30, 2018

Page view(s)

28
checked on Oct 26, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.