Modulation of surface plasmon wave by photo-induced refractive index changes of CdSe quantum dots

Horng Shyang Chen*, Jyh Yang Wang, Sheng Shiuan Yeh, Chii Dong Chen, Hung Yi Lin

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

We demonstrate an all-optical modulation of surface plasmon resonance by photo-irradiation induced dielectric constant change of CdSe quantum dots on the gold surface. The dipole-dipole interaction between the surface plasmon and the photo-induced excitons in the dots gives rise to a shift in the surface plasmon resonance peak. This shift is found to sensitively reflect a tiny change in the dielectric constant, which is useful for investigating the nonlinear effect in active plasmonic components.

Original languageEnglish
Article number011102
JournalApplied Physics Letters
Volume100
Issue number1
DOIs
StatePublished - 2 Jan 2012

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