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Title: Optical nonlinearity enhanced by metal nanoparticle in CdTe quantum dots
Authors: Feng, X. 
Chen, Y.
Hou, D.
Keywords: Optical nonlinearities of condensed matter
Quantum dot
Issue Date: 15-Apr-2011
Citation: Feng, X., Chen, Y., Hou, D. (2011-04-15). Optical nonlinearity enhanced by metal nanoparticle in CdTe quantum dots. Physica B: Condensed Matter 406 (9) : 1702-1705. ScholarBank@NUS Repository.
Abstract: The optical nonlinearity of a CdTe quantum dot enhanced by a gold nanoparticle has been theoretically studied by employing the multi-bands effective mass method. The energy levels have been computed using 6×6 k.p model for the valence band. The semiconductor quantum dot-size-dependent third-order susceptibility of third harmonic generation in a CdTeAu nanocrystal complex has been analyzed. It is found that the metal nanoparticle enhances the optical nonlinearity of the semiconductor quantum dot due to the dipole/multipole interaction that will bring in the strong damping and the field enhancement. By choosing the radius of CdTe quantum dot, the third-order nonlinear susceptibility for third harmonic generation can be optimized for the one- and multi-photon resonance. Also, we can alter the optical nonlinearity by changing the ratio of semiconductormetal nanoparticle distance to the metal nanoparticle radius. © 2011 Elsevier B.V. All rights reserved.
Source Title: Physica B: Condensed Matter
ISSN: 09214526
DOI: 10.1016/j.physb.2011.02.001
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