Harnessing light-matter interactions in colloidal semiconductor nanocrystals
Published on:
9 September 2023
Primary Category:
Materials Science
Paper Authors:
Masaru Oda,
Kazuaki Yamato,
Jyunya Egashira,
Hisao Kondo
Bullets
Key Details
A microcavity with CdSe nanoplatelets in hexane solution was fabricated using distributed Bragg reflectors
Strong exciton-photon coupling occurred at room temperature, evidenced by anticrossing in reflectance spectra
Efficient relaxation to the lower polariton branch was enabled by interactions with longitudinal optical phonons
A model considering coupling to excitons delocalized over randomly oriented nanoplatelets explained the results
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AI generated summary
Harnessing light-matter interactions in colloidal semiconductor nanocrystals
This paper reports on the fabrication of a microcavity containing concentrated colloidal CdSe nanoplatelets dispersed in hexane solution. At room temperature, strong coupling between photons and excitons in the nanoplatelets leads to the formation of hybrid light-matter quasiparticles called polaritons. Emission from the lower polariton branch is enhanced through efficient relaxation pathways enabled by interactions with lattice vibrations (phonons). Overall, this work demonstrates a facile approach to achieving, characterizing and understanding strong coupling phenomena using colloidal nanocrystal systems.
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