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Photoluminescence enhancement and quenching in metal-semiconductor quantum dot hybrid arrays

Haridas, M and Tripathi, LN and Basu, JK (2011) Photoluminescence enhancement and quenching in metal-semiconductor quantum dot hybrid arrays. In: Applied Physics Letters, 98 (6).

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Hybrid monolayer arrays of metal and semiconductor quantum dots have been prepared to study the exciton-plasmon interaction. We observed crossover from strong quenching to enhancement in photoluminescence of the quantum dots as a function of the emission wavelength for fixed interparticle spacings. Remarkably, the enhancement is observed even for extremely short separation at which strong quenching has been observed and predicted earlier. A significant redshift in emission maxima is also observed for quantum dots with quenched emission. The possible role of collective phenomena as well as strong interactions in such ordered hybrid arrays in controlling the emission is discussed. (C) 2011 American Institute of Physics. doi:10.1063/1.3553766]

Item Type: Journal Article
Publication: Applied Physics Letters
Publisher: American Institute of Physics
Additional Information: Copyright of this article belongs to American Institute of Physics.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 08 Apr 2011 07:05
Last Modified: 08 Apr 2011 07:05
URI: http://eprints.iisc.ac.in/id/eprint/36051

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