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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 13 — Jul. 1, 2007
  • pp: 1845–1847

Terahertz time-domain magnetospectroscopy of a high-mobility two-dimensional electron gas

Xiangfeng Wang, David J. Hilton, Lei Ren, Daniel M. Mittleman, Junichiro Kono, and John L. Reno  »View Author Affiliations


Optics Letters, Vol. 32, Issue 13, pp. 1845-1847 (2007)
http://dx.doi.org/10.1364/OL.32.001845


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Abstract

We have observed cyclotron resonance in a high-mobility Ga As Al Ga As two-dimensional electron gas by using the techniques of terahertz time-domain spectroscopy combined with magnetic fields. From this, we calculate the real and imaginary parts of the diagonal elements of the magnetoconductivity tensor, which in turn allows us to extract the concentration, effective mass, and scattering time of the electrons in the sample. We demonstrate the utility of ultrafast terahertz spectroscopy, which can recover the true linewidth of cyclotron resonance in a high-mobility ( > 10 6 cm 2 V 1 s 1 ) sample without being affected by the saturation effect.

© 2007 Optical Society of America

OCIS Codes
(300.6500) Spectroscopy : Spectroscopy, time-resolved
(320.7130) Ultrafast optics : Ultrafast processes in condensed matter, including semiconductors

ToC Category:
Ultrafast Optics

History
Original Manuscript: April 16, 2007
Revised Manuscript: April 29, 2007
Manuscript Accepted: May 2, 2007
Published: June 20, 2007

Citation
Xiangfeng Wang, David J. Hilton, Lei Ren, Daniel M. Mittleman, Junichiro Kono, and John L. Reno, "Terahertz time-domain magnetospectroscopy of a high-mobility two-dimensional electron gas," Opt. Lett. 32, 1845-1847 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-13-1845

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