Time-resolved near-field optical spectroscopy of single semiconductor quantum wires

Thomas Elsaesser; V. Emiliani; T. Guenther; F. Intonti; Christoph Lienau; Richard Noetzel; Klaus H. Ploog

doi:10.1117/12.381461

28 March 2000 Time-resolved near-field optical spectroscopy of single semiconductor quantum wires

Thomas Elsaesser, V. Emiliani, T. Guenther, F. Intonti, Christoph Lienau, Richard Noetzel, Klaus H. Ploog

Proceedings Volume 3940, Ultrafast Phenomena in Semiconductors IV; (2000) https://doi.org/10.1117/12.381461
Event: Symposium on Integrated Optoelectronics, 2000, San Jose, CA, United States

Abstract

Carrier dynamics in single quasi-1D GaAs quantum wires are studied in a wide temperature range by near-field scanning optical microscopy using pico- and femtosecond pulses. Luminescence and pump-probe experiments with a spatial resolution of 250 nm and a time resolution of up to 200 fs allow for a separation of carrier transport along the quantum wire and in the embedding GaAs quantum well from local carrier relaxation phenomena. We demonstrate that local potential barriers close to the quantum wire strongly affect the lateral carrier transport into the quantum wire. This drift-diffusive motion occurs in the pico- to nanosecond regime with diffusion lengths of up to several microns. Diffusive transport along the quantum wire is characterized by carrier motion on a somewhat shorter picosecond time scale. In contrast, sub-picosecond relaxation times are found for the redistribution of carriers from high-lying to low-lying quantum wire states. This relaxation is governed by electron-electron and electron-phonon scattering.

Citation Download Citation

Thomas Elsaesser, V. Emiliani, T. Guenther, F. Intonti, Christoph Lienau, Richard Noetzel, and Klaus H. Ploog "Time-resolved near-field optical spectroscopy of single semiconductor quantum wires", Proc. SPIE 3940, Ultrafast Phenomena in Semiconductors IV, (28 March 2000); https://doi.org/10.1117/12.381461

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available