期刊
NANO LETTERS
卷 16, 期 11, 页码 7137-7141出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.6b03433
关键词
Nanoplatelets; strong coupling; room-temperature; polaritons; microcavity
类别
资金
- Leverhulme Trust
- Oxford Martin School
- EPSRC [EP/K032518/1]
- EPSRC [EP/K032518/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/K032518/1] Funding Source: researchfish
Colloidal semiconductor nanoplatelets exhibit quantum size effects due to their thickness of only a few monolayers, together with strong optical band-edge transitions facilitated by large lateral extensions. In this article, we demonstrate room temperature strong coupling of the light and heavy hole exciton transitions of CdSe nanoplatelets with the photonic modes of an open planar microcavity. Vacuum Rabi splittings of 66 +/- 1 meV and 58 +/- 1 meV are observed for the heavy and light hole excitons, respectively, together with a polariton-mediated hybridization of both transitions. By measuring the concentration of platelets in the film, we compute the transition dipole moment of a nanoplatelet exciton to be mu = (575 +/- 110) D. The large oscillator strength and fluorescence quantum yield of semiconductor nanoplatelets provide a perspective toward novel photonic devices by combining polaritonic and spinoptronic effects.
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