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Updated: May 13, 2026

Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics

Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics

Published on: May 28, 2016

Controlling spontaneous emission with plasmonic optical patch antennas.

C Belacel¹, B Habert, F Bigourdan

¹Laboratoire de Photonique et de Nanostructures, CNRS, UPR20, Marcoussis, France.

|March 7, 2013

Summary

This summary is machine-generated.

We controlled light emission from quantum dots using a plasmonic antenna. This antenna enhanced light direction and speed, achieving a Purcell factor up to 80 for specific quantum dot orientations.

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Area of Science:

Plasmonics
Quantum Optics
Nanophotonics

Background:

Colloidal quantum dots are promising light emitters.
Controlling light emission is crucial for quantum technologies.
Plasmonic antennas can manipulate light-matter interactions.

Purpose of the Study:

To demonstrate control over spontaneous emission rate and radiation pattern.
To investigate the use of plasmonic patch antennas for quantum dot emission enhancement.
To achieve deterministic positioning of quantum dots within the antenna structure.

Main Methods:

Fabrication of a plasmonic patch antenna (gold microdisk over a gold layer with a dielectric spacer).
Deterministic positioning of colloidal quantum dots within the antenna.
Experimental measurement of spontaneous emission rate and radiation pattern.

Main Results:

Quantum dots radiated through the entire antenna structure.
A highly directional, vertical radiation pattern was achieved.
Spontaneous emission rate was significantly accelerated, with Purcell factors up to 80 for perpendicular dipoles.

Conclusions:

Plasmonic patch antennas enable precise control of quantum dot emission.
This approach enhances light extraction efficiency and directionality.
Demonstrates potential for advanced quantum optical devices.