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Proceedings Paper

Quantum bio-nanosensors based on quantum dot-metallic nanoparticle systems
Author(s): S. M. Sadeghi
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Paper Abstract

When metallic nanoparticles are put in the vicinity of semiconductor quantum dots and driven by a coherent light source, their intrinsic plasmonic fields can be replaced with a new type of fields (coherent-plasmonic fields). These fields are generated via coherent coupling of excitons in quantum dots and localized surface plasmon resonances (LSPRs). We show the coherent-plasmonic field of a metallic nanoparticle can lead to a significantly larger field enhancement than that caused by its LSPR. Utilizing this, we investigate how such a coherent field enhancement can improve the sensitivities plasmonic nanosensors for detection single biological molecules. The results demonstrate application of quantum coherence in quantum dot-metallic nanoparticle systems for chemical and biological sensing applications.

Paper Details

Date Published: 5 March 2013
PDF: 7 pages
Proc. SPIE 8570, Frontiers in Biological Detection: From Nanosensors to Systems V, 85700J (5 March 2013); doi: 10.1117/12.2003079
Show Author Affiliations
S. M. Sadeghi, The Univ. of Alabama in Huntsville (United States)

Published in SPIE Proceedings Vol. 8570:
Frontiers in Biological Detection: From Nanosensors to Systems V
Benjamin L. Miller; Philippe M. Fauchet, Editor(s)

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