Direct observation of three-photon resonance in water-soluble ZnS quantum dots

Jun He; Gregory D. Scholes; Yu Long Ang; Wei Ji; Cyrus W.J. Beh; Wee Shong Chin

doi:10.1063/1.2906904

Direct observation of three-photon resonance in water-soluble ZnS quantum dots

Jun He, Gregory D. Scholes, Yu Long Ang, Wei Ji, Cyrus W.J. Beh, Wee Shong Chin

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

We report on large three-photon absorption (3PA) in thioglycol-capped ZnS semiconductor quantum dots (QDs) at different wavelengths with femtosecond Z-scan technique. Both the intrinsic 3PA coefficients and cross sections of the 1.3 nm sized ZnS QDs in aqueous solution are nearly one order of magnitude greater than that of ZnS bulk crystal. The 3PA resonance in ZnS QDs is observed at the lowest excitonic transition of 1S (e) -1 S32 (h).

Original language	English (US)
Article number	131114
Journal	Applied Physics Letters
Volume	92
Issue number	13
DOIs	https://doi.org/10.1063/1.2906904
State	Published - 2008
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.2906904

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title = "Direct observation of three-photon resonance in water-soluble ZnS quantum dots",

abstract = "We report on large three-photon absorption (3PA) in thioglycol-capped ZnS semiconductor quantum dots (QDs) at different wavelengths with femtosecond Z-scan technique. Both the intrinsic 3PA coefficients and cross sections of the 1.3 nm sized ZnS QDs in aqueous solution are nearly one order of magnitude greater than that of ZnS bulk crystal. The 3PA resonance in ZnS QDs is observed at the lowest excitonic transition of 1S (e) -1 S32 (h).",

author = "Jun He and Scholes, {Gregory D.} and Ang, {Yu Long} and Wei Ji and Beh, {Cyrus W.J.} and Chin, {Wee Shong}",

note = "Funding Information: This work is supported by the Natural Sciences and Engineering Research Council of Canada and the National University of Singapore (Grant No. R-144-000-097-112). ",

year = "2008",

doi = "10.1063/1.2906904",

language = "English (US)",

volume = "92",

journal = "Applied Physics Letters",

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T1 - Direct observation of three-photon resonance in water-soluble ZnS quantum dots

AU - He, Jun

AU - Scholes, Gregory D.

AU - Ang, Yu Long

AU - Ji, Wei

AU - Beh, Cyrus W.J.

AU - Chin, Wee Shong

N1 - Funding Information: This work is supported by the Natural Sciences and Engineering Research Council of Canada and the National University of Singapore (Grant No. R-144-000-097-112).

PY - 2008

Y1 - 2008

N2 - We report on large three-photon absorption (3PA) in thioglycol-capped ZnS semiconductor quantum dots (QDs) at different wavelengths with femtosecond Z-scan technique. Both the intrinsic 3PA coefficients and cross sections of the 1.3 nm sized ZnS QDs in aqueous solution are nearly one order of magnitude greater than that of ZnS bulk crystal. The 3PA resonance in ZnS QDs is observed at the lowest excitonic transition of 1S (e) -1 S32 (h).

AB - We report on large three-photon absorption (3PA) in thioglycol-capped ZnS semiconductor quantum dots (QDs) at different wavelengths with femtosecond Z-scan technique. Both the intrinsic 3PA coefficients and cross sections of the 1.3 nm sized ZnS QDs in aqueous solution are nearly one order of magnitude greater than that of ZnS bulk crystal. The 3PA resonance in ZnS QDs is observed at the lowest excitonic transition of 1S (e) -1 S32 (h).

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DO - 10.1063/1.2906904

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JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 13

M1 - 131114

ER -

Direct observation of three-photon resonance in water-soluble ZnS quantum dots

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All Science Journal Classification (ASJC) codes

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