Three-photon absorption in ZnSe and ZnSe∕ZnS quantum dots

200762 citationsJournal Article

Authors

Amit D. Lad · Savitribai Phule Pune University

P. Prem Kiran · Tata Institute of Fundamental Research

G. Ravindra Kumar · Tata Institute of Fundamental Research

Shailaja Mahamuni · Savitribai Phule Pune University

Abstract

ZnSe and ZnSe∕ZnS core/shell quantum dots (QDs) of two different sizes (4.5 and 3.5nm) have been synthesized. The nonlinear absorption is measured at 1064nm using a 35ps laser with an open aperture Z-scan setup. Three-photon absorption (3PA) has been observed in ZnSe and ZnSe∕ZnS QDs. 3PA cross section is found to be about four orders of magnitude larger than bulk ZnSe, and three orders of magnitude higher than ZnS QDs. 3PA cross section is found to be increased in ZnSe and in ZnSe∕ZnS QDs with decreasing size from 4.5to3.5nm, due to strong confinement effect.

Topics & Keywords

Quantum Dots Synthesis And Properties Nonlinear Optical Materials Studies Chalcogenide Semiconductor Thin Films

Publication Details

Published in: Applied Physics Letters

Volume 90, Issue 13

DOI: 10.1063/1.2714994

Field-Weighted Citation Impact: 3.60

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Three-photon absorption in ZnSe and ZnSe∕ZnS quantum dots

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Abstract

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Publication Details