Room temperature single-photon superfluorescence from a single epitaxial cuboid nano-heterostructure

• URL: http://arxiv.org/abs/2104.06452v1
• Date: Tue, 13 Apr 2021 18:52:30 GMT
• Title: Room temperature single-photon superfluorescence from a single epitaxial cuboid nano-heterostructure
• Authors: John P. Philbin, Joseph Kelly, Lintao Peng, Igor Coropceanu, Abhijit Hazarika, Dmitri V. Talapin, Eran Rabani, Xuedan Ma, and Prineha Narang
• Abstract summary: Single-photon superradiance can emerge when a collection of identical emitters are spatially separated by distances much less than the wavelength of the light they emit. We show that the faces of a heterostructure nanocuboid mimic individual quasi-2D nanoplatelets and can serve as the robust emitters required to realize superradiant phenomena at room temperature.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Single-photon superradiance can emerge when a collection of identical emitters are spatially separated by distances much less than the wavelength of the light they emit, and is characterized by the formation of a superradiant state that spontaneously emits light with a rate that scales linearly with the number of emitters. This collective phenomena has only been demonstrated in a few nanomaterial systems, all requiring temperatures below 10K. Here, we rationally design a single colloidal nanomaterial that hosts multiple (nearly) identical emitters that are impervious to the fluctuations which typically inhibit room temperature superradiance in other systems such as molecular aggregates. Specifically, by combining molecular dynamics, atomistic electronic structure calculations, and model Hamiltonian methods, we show that the faces of a heterostructure nanocuboid mimic individual quasi-2D nanoplatelets and can serve as the robust emitters required to realize superradiant phenomena at room temperature. Leveraging layer-by-layer colloidal growth techniques to synthesize a nanocuboid, we demonstrate single-photon superfluorescence via single-particle time-resolved photoluminescence measurements at room temperature. This robust observation of both superradiant and subradiant states in single nanocuboids opens the door to ultrafast single-photon emitters and provides an avenue to entangled multi-photon states via superradiant cascades.

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