Cooperative Energy Transfer Controls the Spontaneous Emission Rate Beyond Field Enhancement Limits
- Case Western Reserve Univ., Cleveland, OH (United States); DOE/OSTI
- Case Western Reserve Univ., Cleveland, OH (United States); IIT-Istituto Italiano di Tecnologia, Genova (Italy)
- Case Western Reserve Univ., Cleveland, OH (United States)
- IIT-Istituto Italiano di Tecnologia, Genova (Italy)
- Jackson State Univ., Jackson, MS (United States)
- Case Western Reserve Univ., Cleveland, OH (United States); IIT-Istituto Italiano di Tecnologia, Genova (Italy); Univ. of Calabria, Rende (Italy)
Quantum emitters located in proximity to a metal nanostructure individually transfer their energy via near-field excitation of surface plasmons. The energy transfer process increases the spontaneous emission (SE) rate due to plasmon-enhanced local field. Here, we demonstrate a significant acceleration of the quantum emitter SE rate in a plasmonic nanocavity due to cooperative energy transfer (CET) from plasmon-correlated emitters. Using an integrated plasmonic nanocavity, we realize up to sixfold enhancement in the emission rate of emitters coupled to the same nanocavity on top of the plasmonic enhancement of the local density of states. The radiated power spectrum retains the plasmon resonance central frequency and line shape, with the peak amplitude proportional to the number of excited emitters indicating that the observed cooperative SE is distinct from superradiance. As a result, plasmon-assisted CET offers unprecedented control over the SE rate and allows us to dynamically control the spontaneous emission rate at room temperature which can enable SE rate based optical modulators.
- Research Organization:
- Case Western Reserve Univ., Cleveland, OH (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); NSF
- Grant/Contract Number:
- SC0008148
- OSTI ID:
- 1611019
- Alternate ID(s):
- OSTI ID: 1515107
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 20 Vol. 122; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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