Title

Frequency degenerate and nondegenerate two-photon absorption spectra of semiconductor quantum dots

Authors

Authors

L. A. Padilha; J. Fu; D. J. Hagan; E. W. Van Stryland; C. L. Cesar; L. C. Barbosa; C. H. B. Cruz; D. Buso;A. Martucci

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Phys. Rev. B

Keywords

OPTICAL NONLINEARITIES; CDSE NANOCRYSTALS; DOPED GLASSES; SPECTROSCOPY; CDTE; ENHANCEMENT; TRANSITIONS; ASSIGNMENT; GROWTH; Physics, Condensed Matter

Abstract

The frequency degenerate and nondegenerate two-photon absorption (2PA) spectra of direct band gap semiconductor quantum dots are studied. Measuring the spectra for both cases in samples of CdSe and CdTe with different quantum dot sizes and size distributions, we observe that the 2PA spectra and the 2PA coefficient are size dependent, so that smaller dots have smaller 2PA even after taking into account the volume fraction. Theory considering the mixing of the hole bands, in a k center dot p model, explains the data quite well except for the smallest dots. A comparison with the parabolic band approximation is also shown.

Journal Title

Physical Review B

Volume

75

Issue/Number

7

Publication Date

1-1-2007

Document Type

Article

DOI Link

http://dx.doi.org/10.1103/PhysRevB.75.075325

Language

English

First Page

8

WOS Identifier

WOS:000244533400079

ISSN

1098-0121

Recommended Citation

"Frequency degenerate and nondegenerate two-photon absorption spectra of semiconductor quantum dots" (2007). Faculty Bibliography 2000s. 7501.
https://stars.library.ucf.edu/facultybib2000/7501