Hybrid optical materials of plasmon-coupled CdSe/ZnS coreshells for photonic applications

Jaetae Seo, Rafal Fudala, Wan Joong Kim, Ryan Rich, Bagher Tabibi, Hyoyeong Cho, Zygmunt Gryczynski, Ignacy Gryczynski, William Yu

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

A hybrid optical nanostructure of plasmon-coupled SQDs was developed for photonic applications. The coupling distances between the mono-layers of Au nanoparticles with a surface concentration of ~9.18 × 10-4 nm-2 and CdSe/ZnS SQDs with that of ~3.7 × 10-3 nm-2 were controlled by PMMA plasma etching. Time-resolved spectroscopy of plasmon-coupled SQDs revealed a strong shortening of the longest lifetime and ~9-fold PL enhancement. Polarization-resolved PL spectroscopy displayed linear polarization and depolarization at near- and far-field plasmon-coupling, respectively. The physical origin of PL enhancement could be attributable to both the large local field enhancement and the fast resonant energy transfer.

Original languageEnglish
Pages (from-to)1026-1039
Number of pages14
JournalOptical Materials Express
Volume2
Issue number8
DOIs
StatePublished - Aug 2012

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