Quantum-sized gold clusters as efficient two-photon absorbers

Guda Ramakrishna; Oleg Varnavski; Junhyung Kim; Dongil Lee; Theodore Goodson

doi:10.1021/ja800341v

Quantum-sized gold clusters as efficient two-photon absorbers

Guda Ramakrishna, Oleg Varnavski, Junhyung Kim, Dongil Lee, Theodore Goodson

Department of Chemistry

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

312 Citations (Scopus)

Abstract

The two-photon absorption properties of Au₂₅ cluster has been investigated with the aid of two-photon excited fluorescence in the communication wavelength region with a cross-section of 2700 GM at 1290 nm. Additional visible fluorescence has been discovered for small gold clusters which is two-photon allowed (after excitation at 800 nm), and the absolute cross-section has been determined for gold clusters with number of gold atoms varying from 25 to all the way up to 2406 using one and two-photon excited time-resolved fluorescence upconversion measurements. Record high TPA cross-sections have been measured for quantum sized clusters making them suitable for two-photon imaging as well as other applications such as optical power limiting and lithography.

Original language	English
Pages (from-to)	5032-5033
Number of pages	2
Journal	Journal of the American Chemical Society
Volume	130
Issue number	15
DOIs	https://doi.org/10.1021/ja800341v
Publication status	Published - 2008 Apr 16

All Science Journal Classification (ASJC) codes

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

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10.1021/ja800341v

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abstract = "The two-photon absorption properties of Au25 cluster has been investigated with the aid of two-photon excited fluorescence in the communication wavelength region with a cross-section of 2700 GM at 1290 nm. Additional visible fluorescence has been discovered for small gold clusters which is two-photon allowed (after excitation at 800 nm), and the absolute cross-section has been determined for gold clusters with number of gold atoms varying from 25 to all the way up to 2406 using one and two-photon excited time-resolved fluorescence upconversion measurements. Record high TPA cross-sections have been measured for quantum sized clusters making them suitable for two-photon imaging as well as other applications such as optical power limiting and lithography.",

author = "Guda Ramakrishna and Oleg Varnavski and Junhyung Kim and Dongil Lee and Theodore Goodson",

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AU - Ramakrishna, Guda

AU - Varnavski, Oleg

AU - Kim, Junhyung

AU - Lee, Dongil

AU - Goodson, Theodore

PY - 2008/4/16

Y1 - 2008/4/16

N2 - The two-photon absorption properties of Au25 cluster has been investigated with the aid of two-photon excited fluorescence in the communication wavelength region with a cross-section of 2700 GM at 1290 nm. Additional visible fluorescence has been discovered for small gold clusters which is two-photon allowed (after excitation at 800 nm), and the absolute cross-section has been determined for gold clusters with number of gold atoms varying from 25 to all the way up to 2406 using one and two-photon excited time-resolved fluorescence upconversion measurements. Record high TPA cross-sections have been measured for quantum sized clusters making them suitable for two-photon imaging as well as other applications such as optical power limiting and lithography.

AB - The two-photon absorption properties of Au25 cluster has been investigated with the aid of two-photon excited fluorescence in the communication wavelength region with a cross-section of 2700 GM at 1290 nm. Additional visible fluorescence has been discovered for small gold clusters which is two-photon allowed (after excitation at 800 nm), and the absolute cross-section has been determined for gold clusters with number of gold atoms varying from 25 to all the way up to 2406 using one and two-photon excited time-resolved fluorescence upconversion measurements. Record high TPA cross-sections have been measured for quantum sized clusters making them suitable for two-photon imaging as well as other applications such as optical power limiting and lithography.

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Quantum-sized gold clusters as efficient two-photon absorbers

Abstract

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