Terahertz emission from magnetoplasma oscillations in semiconductors

James N. Heyman; H. Wrage; C. Lind; D. Hebert; P Neocleous; P. A. Crowell; T. Mueller; Karl Unterrainer

doi:10.1117/12.470418

11 June 2002 Terahertz emission from magnetoplasma oscillations in semiconductors

James N. Heyman, H. Wrage, C. Lind, D. Hebert, P Neocleous, P. A. Crowell, T. Mueller, Karl Unterrainer

Proceedings Volume 4643, Ultrafast Phenomena in Semiconductors VI; (2002) https://doi.org/10.1117/12.470418
Event: Symposium on Integrated Optoelectronic Devices, 2002, San Jose, California, United States

Abstract

Ultrafast terahertz spectroscopy can be used to probe charge and spin dynamics in semiconductors. We have studied THz emission from bulk InAs and GaAs and from GaAs/AlGaAs quantum wells as a function of magnetic field. Ultrashort pulses of THz radiation were produced at semiconductor surfaces by photoexcitation with a femtosecond Ti-Sapphire laser, and we recorded the THz emission spectrum and the integrated THz power as a function of magnetic field and temperature. In bulk samples the emitted radiation is produced by coupled cyclotron-plasma oscillations: we model THz emission from n-GaAs as magneto-plasma oscillations in a 3-D electron gas. THz emission from a modulation-doped parabolic quantum well is described in terms of coupled intersubband-cyclotron motion. A model including both 3-D plasma oscillations and a 2-D electron gas in a surface accumulation layer is required to describe THz emission from InAs in a magnetic field.

Citation Download Citation

James N. Heyman, H. Wrage, C. Lind, D. Hebert, P Neocleous, P. A. Crowell, T. Mueller, and Karl Unterrainer "Terahertz emission from magnetoplasma oscillations in semiconductors", Proc. SPIE 4643, Ultrafast Phenomena in Semiconductors VI, (11 June 2002); https://doi.org/10.1117/12.470418

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