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Optically induced charge storage and current generation in InAs quantum dots

Författare:
Publiceringsår: 2002
Språk: Engelska
Sidor:
Publikation/Tidskrift/Serie: Physical Review B
Volym: 65
Nummer: 7
Dokumenttyp: Artikel
Förlag: American Physical Society

Sammanfattning

We report on optically induced charge storage effects and cur-rent generation in self-assembled InAs quantum dots embedded in an InP matrix. Illumination with photons of energy higher than about 0.86 eV efficiently loads the dots with a maximum of about 1 hole/dot. The spectral response at lower photon energy is strongly enhanced at elevated temperatures. We present a detailed balance model for the dots and discuss the thermally assisted optical excitation processes pertinent to hole accumulation. We also show that these processes make the dots act as nanometer-scaled temperature-dependent current generators.

Disputation

Nyckelord

  • Physics and Astronomy

Övriga

Published
Yes
  • ISSN: 1098-0121

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