Dark exciton decay dynamics of a semiconductor quantum dot | Zendy

Dalgarno Paul A. | Zendy; Smith Jason M. | Zendy; Gerardot Brian D. | Zendy; Govorov Alexander O. | Zendy; Karrai Khaled | Zendy; Petroff Pierre M. | Zendy; Warburton Richard J. | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Premium

Dark exciton decay dynamics of a semiconductor quantum dot

Author(s) -

Dalgarno Paul A.,

Smith Jason M.,

Gerardot Brian D.,

Govorov Alexander O.,

Karrai Khaled,

Petroff Pierre M.,

Warburton Richard J.

Publication year - 2005

Publication title -

physica status solidi (a)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.532

H-Index - 104

eISSN - 1862-6319

pISSN - 1862-6300

DOI - 10.1002/pssa.200562029

Subject(s) - exciton , trion , biexciton , quantum dot , physics , spin (aerodynamics) , fermi's golden rule , condensed matter physics , exponential decay , excitation , atomic physics , spin flip , semiconductor , fermi gamma ray space telescope , quantum mechanics , scattering , thermodynamics

We report measurements of the exciton decay dynamics of a single self‐assembled quantum dot following non‐resonant excitation. The singly charged exciton, the trion, exhibits a simple one component exponential decay corresponding to radiative recombination. Conversely, the neutral exciton exhibits a two component exponential decay. We argue that the secondary component arises from dark exciton creation and subsequent conversion to a bright exciton through a spin flip. The spin flip time is a strong function of the bias applied between a Fermi reservoir close to the dot and a Schottky gate electrode as a result of a Kondo‐like spin swap process. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here

Accelerating Research