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Cavity quantum electrodynamics on a nanofiber using a composite photonic crystal cavity
Ramachandrarao Yalla1, Mark Sadgrove1, Kali P Nayak1
1Center for Photonic Innovations, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan.
Physical Review Letters
|October 18, 2014
Summary
We achieved cavity quantum electrodynamics (QED) in the Purcell regime using single quantum dots on an optical nanofiber. This enhanced spontaneous emission into guided modes, enabling on-fiber quantum interfaces for quantum networks.
Area of Science:
- Quantum optics
- Condensed matter physics
- Nanophotonics
Background:
- Cavity quantum electrodynamics (QED) studies light-matter interactions.
- The Purcell regime enhances spontaneous emission rates.
- Optical nanofibers offer unique platforms for light-matter interfaces.
Purpose of the Study:
- To demonstrate cavity QED in the Purcell regime for single quantum emitters on an optical nanofiber.
- To develop a composite photonic crystal cavity using an optical nanofiber and a nanofabricated grating.
- To investigate the enhancement of spontaneous emission rates into nanofiber-guided modes.
Main Methods:
- Fabrication of a composite photonic crystal cavity by combining an optical nanofiber and a nanofabricated grating.
- Integration of single quantum dots onto the surface of the optical nanofiber.
- Measurement of spontaneous emission rates from single quantum dots within the cavity.
Main Results:
- Demonstration of cavity QED conditions in the Purcell regime.
- Significant enhancement of spontaneous emission rate into nanofiber-guided modes for single quantum dots.
- Successful creation of a composite photonic crystal cavity on an optical nanofiber.
Conclusions:
- The developed on-fiber cavity QED system enables enhanced light-matter interactions.
- The results pave the way for advanced on-fiber quantum interfaces.
- Potential applications in quantum networks and quantum information processing.
