Nano-scale Schottky contacts: ultrafast drift-diffusion dynamics studied in the optical near field
Author
Summary, in English
We present direct measurements of the ultrafast carrier dynamics around buried nano-scale Schottky contacts with high spatial and time resolution, performed with a novel fermosecond near-field scanning optical microscope, It is shown that high optically excited carrier densities screen the built-in field around a Schottky contact and allow for efficient transport of electrons towards the contact, followed by trapping of electrons into the metal. 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. (C) 2002 Elsevier Science B.V. All rights reserved.
Publishing year
2002
Language
English
Pages
819-822
Publication/Series
Physica E: Low-Dimensional Systems and Nanostructures
Volume
13
Issue
2-4
Document type
Journal article
Publisher
Elsevier
Topic
- Condensed Matter Physics
- Electrical Engineering, Electronic Engineering, Information Engineering
Keywords
- ultrafast carrier transport
- Schottky nano-contacts
- near-field optics
- W-GaAs
Status
Published
ISBN/ISSN/Other
- ISSN: 1386-9477