The transition from localized to collective electronic states in a silver quantum dots monolayer examined by nonlinear optical response

F. Remacle; C. P. Collier; J. R. Heath; R. D. Levine

doi:10.1016/S0009-2614(98)00612-5

The transition from localized to collective electronic states in a silver quantum dots monolayer examined by nonlinear optical response

F. Remacle, C. P. Collier, J. R. Heath, R. D. Levine

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

39 Scopus citations

Abstract

The optical second-harmonic response of a finite hexagonal lattice is computed as a function of the inter particle separation. In agreement with experiments on Langmuir monolayers of silver quantum dots, the computed response exhibits a peak due to a transition from localized electronic states to a band-like structure. The localization is due to the fluctuations in the particle size and position. For a perfect lattice the variation of the nonlinear response with the inter particle separation is qualitatively different. The role of the symmetry breaking is demonstrated at the tight binding level of electronic structure computations.

Original language	English
Pages (from-to)	453-458
Number of pages	6
Journal	Chemical Physics Letters
Volume	291
Issue number	3-4
DOIs	https://doi.org/10.1016/S0009-2614(98)00612-5
State	Published - Jul 17 1998
Externally published	Yes

Funding

We thank Professor S. Efrima for discussions. FR is Chercheur Qualifié, FNRS, Belgium. This work was partly supported by the James Franck program (FR and RDL) and NSF-National Young Investigator program and ONR order N00014-95-F-0099 (JRH) and used the computational facilities of UCLA and of SFB 377.

Funders	Funder number
NSF-National
Office of Naval Research	N00014-95-F-0099
University of California, Los Angeles	SFB 377

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10.1016/S0009-2614(98)00612-5

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AB - The optical second-harmonic response of a finite hexagonal lattice is computed as a function of the inter particle separation. In agreement with experiments on Langmuir monolayers of silver quantum dots, the computed response exhibits a peak due to a transition from localized electronic states to a band-like structure. The localization is due to the fluctuations in the particle size and position. For a perfect lattice the variation of the nonlinear response with the inter particle separation is qualitatively different. The role of the symmetry breaking is demonstrated at the tight binding level of electronic structure computations.

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The transition from localized to collective electronic states in a silver quantum dots monolayer examined by nonlinear optical response

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