Open AccessHybrid optical materials of plasmon-coupled CdSe/ZnS coreshells for photonic applications
Author(s) -
Jaetae Seo,
Rafał Fudala,
Wan-Joong Kim,
Ryan Rich,
Bagher Tabibi,
Hyoyeong Cho,
Zygmunt Gryczyński,
Ignacy Gryczyński,
William W. Yu
Publication year - 2012
Publication title -
optical materials express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.925
H-Index - 66
ISSN - 2159-3930
DOI - 10.1364/ome.2.001026
Subject(s) - materials science , plasmon , optoelectronics , surface plasmon resonance , spectroscopy , surface plasmon , photonics , polarization (electrochemistry) , nanostructure , nanoparticle , near field scanning optical microscope , nanotechnology , scanning electron microscope , optical microscope , chemistry , physics , quantum mechanics , composite material
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.