Strong exciton-photon coupling with colloidal nanoplatelets in an open microcavity

Abstract

Colloidal semiconductor nanoplatelets exhibit quantum size effects due to their thickness of only 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 $66\pm 1$ meV and $58\pm 1$ meV are observed for the heavy and light hole excitons respectively, together with a polariton-mediated hybridisation of both transitions. By measuring the concentration of platelets in the film we compute the transition dipole moment of a nanoplatelet exciton to be $\mu =(575\pm 110)$ D. The large oscillator strength and fluorescence quantum yield of semiconductor nanoplatelets provide a perspective towards novel photonic devices, combining polaritonic and spinoptronic effects.

arXiv comment9 pages, 4 figures

References in corpus (7)

• Strong light-matter coupling in two-dimensional atomic crystals
• Observation of Superfluidity of Polaritons in Semiconductor Microcavities
• Exciton-polariton condensates
• Evidence of giant oscillator strength in the exciton dephasing of CdSe nanoplatelets measured by resonant four-wave mixing
• Interaction-induced hopping phase in driven-dissipative coupled photonic microcavities
• p-State Luminescence in CdSe Nanoplatelets: The Role of Lateral Confinement and an LO Phonon Bottleneck
• Exciton-phonon scattering and photo-excitation dynamics in J-aggregate microcavities

Cited by in corpus (8)

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• Simultaneous Existence of Confined and Delocalized Vibrational Modes in Colloidal Quantum Dots
• Room temperature cavity polaritons with 3D hybrid perovskite - Towards low-cost polaritonic devices
• Room-temperature cavity exciton-polariton condensation in perovskite quantum dots
• Optical and electronic properties of colloidal CdSe Quantum Rings
• Strong exciton-photon coupling with colloidal quantum dots in a tuneable microcavity
• Conformational Control of Exciton-Polariton Physics in Metal - Poly(9,9-dioctylfluorene) - Metal Cavities
• Sustained biexciton emission in colloidal quantum wells assisted by dopant-host interaction