Strong coupling and induced transparency at room temperature with single quantum dots and gap plasmons
Open Access
- 1 October 2018
- journal article
- research article
- Published by Springer Science and Business Media LLC in Nature Communications
- Vol. 9 (1), 1-7
- https://doi.org/10.1038/s41467-018-06450-4
Abstract
Coherent coupling between plasmons and transition dipole moments in emitters can lead to two distinct spectral effects: vacuum Rabi splitting at strong coupling strengths, and induced transparency (also known as Fano interference) at intermediate coupling strengths. Achieving either strong or intermediate coupling between a single emitter and a localized plasmon resonance has the potential to enable single-photon nonlinearities and other extreme light-matter interactions, at room temperature and on the nanometer scale. Both effects produce two peaks in the spectrum of scattering from the plasmon resonance, and can thus be confused if scattering measurements alone are performed. Here we report measurements of scattering and photoluminescence from individual coupled plasmon-emitter systems that consist of a single colloidal quantum dot in the gap between a gold nanoparticle and a silver film. The measurements unambiguously demonstrate weak coupling (the Purcell effect), intermediate coupling (Fano interference), and strong coupling (Rabi splitting) at room temperature.Funding Information
- DOC | National Institute of Standards and Technology (14D295)
- National Science Foundation (CHE 1507462)
This publication has 45 references indexed in Scilit:
- Novel Nanostructures and Materials for Strong Light Matter InteractionsACS Photonics, 2018
- A quantum phase switch between a single solid-state spin and a photonNature Nanotechnology, 2016
- Modified spontaneous emission in nanophotonic structuresNature Photonics, 2015
- Macroscopic rotation of photon polarization induced by a single spinNature Communications, 2015
- Linear and nonlinear optical spectroscopy of a strongly coupled microdisk–quantum dot systemNature, 2007
- Controlling cavity reflectivity with a single quantum dotNature, 2007
- Exciton-Photon Strong-Coupling Regime for a Single Quantum Dot Embedded in a MicrocavityPhysical Review Letters, 2005
- Vacuum Rabi splitting with a single quantum dot in a photonic crystal nanocavityNature, 2004
- Strong coupling in a single quantum dot–semiconductor microcavity systemNature, 2004
- Single-mode Spontaneous Emission from a Single Quantum Dot in a Three-Dimensional MicrocavityPhysical Review Letters, 2001