Journal ArticleDOI
Terahertz emission in single quantum wells after coherent optical excitation of light hole and heavy hole excitons.
Paul C. M. Planken,Martin C. Nuss,Igal Brener,Keith W. Goossen,Marie S. C. Luo,Shun Lien Chuang,Loren Pfeiffer +6 more
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TLDR
The first observation of coherent terahertz radiation is reported, tunable from 1.4 to 2.6 THz, emerging from GaAs/Al 0.3 Ga 0.7 As single quantum wells after the coherent optical excitation of both light hole and heavy hole excitons.Abstract:
We report on the first observation of coherent terahertz radiation, tunable from 1.4 to 2.6 THz, emerging from GaAs/Al 0.3 Ga 0.7 As single quantum wells after the coherent optical excitation of both light hole and heavy hole excitons. We attribute the radiation to charge oscillations following the coherent excitation of the excitons in an electric field. Terahertz radiation is also emitted when no electric field is present in the sample suggesting that valence band mixing leads to a significant far-infrared transition dipole moment between the light hole and heavy hole subbandsread more
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Journal ArticleDOI
Exploring dynamics in the far-infrared with terahertz spectroscopy.
Journal ArticleDOI
Theory of ultrafast phenomena in photoexcited semiconductors
Fausto Rossi,Tilmann Kuhn +1 more
TL;DR: In this article, the authors review the physics of ultrafast dynamics in semiconductors and their heterostructures, including both the observed experimental phenomena and the theoretical description of the processes.
Journal ArticleDOI
A direct comparison between terahertz time-domain spectroscopy and far-infrared Fourier transform spectroscopy
TL;DR: In this paper, a comprehensive comparison between terahertz (THz) time-domain spectroscopy and conventional far-infrared Fourier transform spectrograms is performed, including radiation source, detector, signal to noise ratio, bandwidth, availability, applications, and uniqueness.
Book ChapterDOI
Terahertz time-domain spectroscopy
Martin C. Nuss,Joseph Orenstein +1 more
TL;DR: The terahertz time-domain spectroscopy (THz-TDS) as discussed by the authors is a new spectroscopic technique that overcomes these difficulties in a radical way, and it has achieved a rapid proliferation within the last few years from a handful of ultrafast laser experts to researchers in a wide range of disciplines.
Journal ArticleDOI
Free-space coherent broadband terahertz time-domain spectroscopy
P. Y. Han,Xi-Cheng Zhang +1 more
TL;DR: In this paper, a free-space broadband terahertz (THz) spectroscopy technique with frequency ranging from 30 GHz to over 40 THz is presented. But the authors focus on a time-domain detection technique using free-spaces electro-optic sampling.