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Carrier dynamics around nano-scale Schottky contacts: a femtosecond near-field study

In English

Författare

Summary, in English

We report spatially and time-resolved measurements of ultrafast carrier dynamics around buried nano-scale Schottky contacts, performed with a novel femtosecond near-field scanning optical microscope. The experimental results are modeled by a self-consistent treatment of the drift-diffusion equation for the carriers and Poisson's equation for the built-in electric field. We show that the built-in field suppresses electron transport towards and trapping into the metal particles at lower optically excited carrier densities. In contrast, efficient electron trapping into the metal occurs at higher electron densities, which screen the built-in field, allowing for efficient transport of electrons towards the Schottky contact. (C) 2002 Elsevier Science B.V. All rights reserved.

Publiceringsår

2002

Språk

Engelska

Sidor

513-516

Publikation/Tidskrift/Serie

Applied Surface Science

Volym

190

Issue

1-4

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Condensed Matter Physics
  • Electrical Engineering, Electronic Engineering, Information Engineering

Nyckelord

  • Schottky nano-contacts
  • near-field optics
  • ultrafast carrier transport

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1873-5584