Controlling spontaneous emission with plasmonic optical patch antennas.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 23461679.
- Also identified by DOI 10.1021/nl3046602.
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Abstract
We experimentally demonstrate the control of the spontaneous emission rate and the radiation pattern of colloidal quantum dots deterministically positioned in a plasmonic patch antenna. The antenna consists of a thin gold microdisk separated from a planar gold layer by a few tens of nanometers thick dielectric layer. The emitters are shown to radiate through the entire patch antenna in a highly directional and vertical radiation pattern. Strong acceleration of spontaneous emission is observed, depending on the antenna geometry. Considering the double dipole structure of the emitters, this corresponds to a Purcell factor up to 80 for dipoles perpendicular to the disk.
Medical subject headings
- Colloids
- Gold
- Quantum Dots