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Deterministic radiative coupling between plasmonic nanoantennas and semiconducting nanowire quantum dots
Mathieu Jeannin1, Pamela Rueda-Fonseca, Edith Bellet-Amalric
1Univ. Grenoble Alpes, F-38000 Grenoble, France. CNRS, Institut Néel, 'Nanophysique et semiconducteurs' group, F-38000 Grenoble, France.
Nanotechnology
|March 23, 2016
Summary
We demonstrate precise integration of semiconducting nanowire quantum dots with gold nanoantennas. This coupling enhances light absorption and boosts quantum dot emission rates, paving the way for improved optoelectronic devices.
Area of Science:
- Quantum optics
- Nanophotonics
- Solid-state physics
Background:
- Single quantum dots offer unique light-matter interaction properties.
- Plasmonic nanoantennas can enhance light manipulation at the nanoscale.
Purpose of the Study:
- To achieve deterministic coupling between individual nanowire quantum dots and plasmonic nanoantennas.
- To investigate the impact of nanoantennas on quantum dot optical properties.
Main Methods:
- Characterization using micro-photoluminescence and cathodoluminescence.
- Precise positioning of gold nanoantennas via electron-beam lithography.
- Optical property measurements before and after antenna integration.
Main Results:
- Successful fabrication of coupled nanowire quantum dot-nanoantenna systems with 50 nm precision.
- Observed increase in nanowire light absorption.
- Enhanced quantum dot emission rates by up to a factor of two.
Conclusions:
- Deterministic coupling significantly enhances light-matter interactions.
- Plasmonic nanoantennas are effective for improving quantum dot emission efficiency.
- This approach holds promise for advanced quantum information and sensing technologies.
