Abstract

Surface-enhanced Raman scattering (SERS) has used such strong fields to achieve fluorescence enhancement factor over 10¹³ in organic molecules. Semiconductor quantum dots (SQDs) exhibit significant advantages over fluorescence dyes due to their: (a) broader absorption spectra and more readily tunable emission options (b) higher quantum yields, and (c) higher photochemical stability. However, the interactions between SPs and SQDs are still relatively poorly understood. Experiments-to-date give contradictory results on detailed issues that affect fluorescence enhancements [1, 2]. Detailed parametric studies of linear (excitation photon energy > bandgap of SQDs) and nonlinear (excitation photon energy < bandgap of SQDs) fluorescence enhancements in SQDs are strongly needed.

© 2009 IEEE