期刊
ACS PHOTONICS
卷 5, 期 1, 页码 240-248出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.7b00717
关键词
nanoscale quantum optics; plasmonic cavity; strong coupling limit; entanglement; quantum plasmonics; quantum dynamical Purcell factor
类别
资金
- German Research Foundation (DFG) [SPP 1391, PF 317/5]
- Center for Nanoscale Materials, a U.S. Department of Energy Office of Science User Facility [DE-AC02-06CH11357]
Establishing strong coupling between spatially separated and thus selectively addressable quantum emitters is a key ingredient to complex quantum optical schemes in future technologies. Insofar as many plasmonic nanostructures are concerned, however, the energy transfer and mutual interaction strength between distant quantum emitters can fail to provide strong coupling. Here, based on mode hybridization, the longevity and waveguide character of an elliptical plasmon cavity are combined with intense and highly localized field modes of suitably designed nanoantennas. Based on FDTD simulations a quantum emitter-plasmon coupling strength hg = 16.7 meV is reached while simultaneously keeping a small plasmon resonance line width h gamma(s) = 33 meV. This facilitates strong coupling, and quantum dynamical simulations reveal an oscillatory exchange of excited state population arid a notable degree of entanglement between the quantum emitters spatially separated by 1.8 mu m, i.e., about twice the operating wavelength.
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