A review of terahertz sources
TLDR
In this paper, an overview of the range of available terahertz sources, emphasizing recent developments, is given, and the focus then narrows to the sources that rely on surface phenomena.Abstract:
Bibliometric data set the scene by illustrating the growth of terahertz work and the present interest in terahertz science and technology. After locating terahertz sources within the broader context of terahertz systems, an overview is given of the range of available sources, emphasizing recent developments. The focus then narrows to terahertz sources that rely on surface phenomena. Three are highlighted. Optical rectification, usually thought of as a bulk process, may in addition exhibit a surface contribution, which, in some cases, predominates. Transient surface currents, for convenience often separated into drift and diffusion currents, are well understood according to Monte Carlo modelling. Finally, terahertz surface emission by mechanical means—in the absence of photoexcitation—is described.read more
Citations
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Journal Article
Emission of Coherent THz-Radiation from Superconductors.
TL;DR: It is demonstrated that coherent continuous-wave terahertz radiation of sizable power can be extracted from intrinsic Josephson junctions in the layered high-temperature superconductor Bi2Sr2CaCu2O8.
Journal ArticleDOI
Terahertz biophotonics as a tool for studies of dielectric and spectral properties of biological tissues and liquids
O. A. Smolyanskaya,Nikita V. Chernomyrdin,Nikita V. Chernomyrdin,Nikita V. Chernomyrdin,A. A. Konovko,Kirill I. Zaytsev,Kirill I. Zaytsev,Kirill I. Zaytsev,Ilya A. Ozheredov,Olga P. Cherkasova,Olga P. Cherkasova,Maxim Nazarov,Jean-Paul Guillet,Sergei A. Kozlov,Yu. V. Kistenev,Jean-Louis Coutaz,Patrick Mounaix,Vladimir L. Vaks,Joo-Hiuk Son,Hwayeong Cheon,Vincent P. Wallace,Yu. Feldman,Ivan Popov,Anna N. Yaroslavsky,Alexander P. Shkurinov,Alexander P. Shkurinov,Valery V. Tuchin +26 more
TL;DR: In this article, the authors describe the dielectric properties of biological solutions and liquids in the context of terahertz (THz) biophotonics and discuss the methods of sub-wavelength resolution and the problem of THz wave delivery to hard to access tissues and internal organs.
Journal ArticleDOI
Ultrafast photocurrents at the surface of the three-dimensional topological insulator Bi2Se3
Lukas Braun,Gregor Mussler,Andrzej Hruban,Marcin Konczykowski,Thomas Schumann,Martin Wolf,Markus Münzenberg,Luca Perfetti,Tobias Kampfrath +8 more
TL;DR: Three-dimensional topological insulators are fascinating materials with insulating bulk yet metallic surfaces that host highly mobile charge carriers with locked spin and momentum, and photon-helicity-dependent photocurrents are found to be orders of magnitude smaller than expected from generation scenarios based on asymmetric depopulation of the Dirac cone.
Journal ArticleDOI
New frontiers in quantum cascade lasers: High performance room temperature terahertz sources
TL;DR: In this paper, a new class of quantum cascade laser (QCL) light sources that has overcome these limitations led to room temperature operation in the terahertz spectral range, with nearly 2 mW of optical power and significant tunability.
References
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Journal ArticleDOI
Cutting-edge terahertz technology
TL;DR: An overview of the status of the terahertz technology, its uses and its future prospects are presented in this article, with a focus on the use of the waveband in a wide range of applications.
Journal ArticleDOI
Materials for terahertz science and technology
Bradley Ferguson,Xi-Cheng Zhang +1 more
TL;DR: Terahertz spectroscopy and imaging provide a powerful tool for the characterization of a broad range of materials, including semiconductors and biomolecules, as well as novel, higher-power terahertz sources.
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Terahertz semiconductor-heterostructure laser
R. Kohler,Alessandro Tredicucci,Fabio Beltram,Harvey E. Beere,Edmund H. Linfield,Giles Davies,David A. Ritchie,Rita Claudia Iotti,Fausto Rossi +8 more
TL;DR: A monolithic terahertz injection laser that is based on interminiband transitions in the conduction band of a semiconductor (GaAs/AlGaAs) heterostructure is reported, which is very promising for extending the present laser concept to continuous-wave and high-temperature operation, which would lead to implementation in practical photonic systems.
Terahertz semiconductor heterostructure laser
R. Kohler,Alessandro Tredicucci,Fabio Beltram,Harvey E. Beere,Edmund H. Linfield,Giles Davies,David A. Ritchie,Rita Claudia Iotti,Fausto Rossi +8 more
TL;DR: In this article, a monolithic terahertz injection laser that is based on interminiband transitions in the conduction band of a semiconductor (GaAs/AlGaAs) heterostructure is presented.
Journal ArticleDOI
Terahertz quantum-cascade lasers
TL;DR: In this paper, the state-of-the-art and future prospects for terahertz quantum-cascade laser systems are reviewed, including efforts to increase their operating temperatures, deliver higher output powers and emit longer wavelengths.
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