Semiconductor-Metal Nanoparticle Molecules: Hybrid Excitons and the Nonlinear Fano Effect
- 4 October 2006
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 97 (14), 146804
- https://doi.org/10.1103/physrevlett.97.146804
Abstract
Modern nanotechnology opens the possibility of combining nanocrystals of various materials with very different characteristics in one superstructure. Here we study theoretically the optical properties of hybrid molecules composed of semiconductor and metal nanoparticles. Excitons and plasmons in such a hybrid molecule become strongly coupled and demonstrate novel properties. At low incident light intensity, the exciton peak in the absorption spectrum is broadened and shifted due to incoherent and coherent interactions between metal and semiconductor nanoparticles. At high light intensity, the absorption spectrum demonstrates a surprising, strongly asymmetric shape. This shape originates from the coherent internanoparticle Coulomb interaction and can be viewed as a nonlinear Fano effect which is quite different from the usual linear Fano resonance.Keywords
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This publication has 21 references indexed in Scilit:
- Optical Characterization of Bio-assembled Hybrid NanostructuresSupramolecular Chemistry, 2006
- Metal-Enhanced Fluorescence from CdTe Nanocrystals: A Single-Molecule Fluorescence StudyJournal of the American Chemical Society, 2006
- Thermooptical Properties of Gold Nanoparticles Embedded in Ice: Characterization of Heat Generation and MeltingNano Letters, 2006
- Nanoparticle Assemblies with Molecular Springs: A Nanoscale ThermometerAngewandte Chemie, 2005
- Gold Nanoparticles Quench Fluorescence by Phase Induced Radiative Rate SuppressionNano Letters, 2005
- Bioconjugates of CdTe Nanowires and Au Nanoparticles: Plasmon−Exciton Interactions, Luminescence Enhancement, and Collective EffectsNano Letters, 2004
- Colloidal nanocrystal synthesis and the organic–inorganic interfaceNature, 2004
- Surface-Enhanced Emission from Single Semiconductor NanocrystalsPhysical Review Letters, 2002
- Measurement of optical absorption by a single quantum dot excitonPhysical Review B, 2002
- Nanowire Nanosensors for Highly Sensitive and Selective Detection of Biological and Chemical SpeciesScience, 2001