Journal ArticleDOI
Terahertz BWO-Spectrosopy
Boris Gorshunov,Alexander G. Volkov,Igor E. Spektor,A. S. Prokhorov,A. A. Mukhin,Martin Dressel,S. Uchida,Alois Loidl +7 more
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TLDR
In this article, the backward-wave oscillators (BWOs) were used for terahertz-sub-Terahertz (THz-subTHz) spectrometers, based on continuously frequency-tunable coherent sources of radiation.Abstract:
Modern Terahertz-subTerahertz (THz-subTHz) spectrometers, based on continuously frequency-tunable coherent sources of radiation, the backward-wave oscillators (BWOs), are described which cover the frequencies v = 1 cm−1 − 50 cm−1 (0.03 − 1.5 THz) and allow for measurements at temperatures 2 − 1000 K, also in magnetic fields. They allow for direct determination of spectra of any optical parameter of a material at millimeter-submillimeter wavelengths, the domain where infrared or microwave spectrometers encounter serious methodological difficulties. We report on new technical abilities of the quasioptical BWO-spectrometers and discuss their main components. We demonstrate abilities of the THz-subTHz BWO-spectroscopy by presenting some latest results on measurements of dielectric, conducting, superconducting and magnetic materials.read more
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Journal ArticleDOI
Vacuum Electronic High Power Terahertz Sources
John H. Booske,Richard Dobbs,Colin D. Joye,Carol L. Kory,George R. Neil,Gun-Sik Park,Jaehun Park,Richard J. Temkin +7 more
TL;DR: In this paper, the capabilities for vacuum electronic device (VED) sources of powerful terahertz (THz) and near-THz coherent radiation, both CW or average and pulsed, were evaluated.
Journal ArticleDOI
Coherent broadband continuous-wave terahertz spectroscopy on solid-state samples
Axel Roggenbuck,Holger Schmitz,Anselm Deninger,I. Cámara Mayorga,Joachim Hemberger,R. Gusten,Markus Grüninger +6 more
TL;DR: In this article, the authors used a continuous-wave terahertz spectrometer based on photomixing in the frequency range from 60GHz to 1.8THz to obtain the most precise data of "(!) reported to date for the wellstudied example of -lactose monohydrate.
Journal ArticleDOI
On the room temperature multiferroic BiFeO3: magnetic, dielectric and thermal properties
Jun Lu,A. Günther,F. Schrettle,Franz Mayr,Stephan Krohns,Peter Lunkenheimer,Andrei Pimenov,V. D. Travkin,A. A. Mukhin,Alois Loidl +9 more
TL;DR: In this paper, the authors measured the temperature dependence of the dielectric constant and loss for a single crystalline BiFeO3 and found that at room temperature the loss is substantial and strongly frequency dependent, indicating the dominance of hopping conductivity.
Journal ArticleDOI
Review of Terahertz Technology Readiness Assessment and Applications
TL;DR: The progress in THz technology is generating systems with better performance, broader availability of form factors and configurations, and tighter integration with particular applications, which will reduce the gap between the capabilities of the technology and the high-demanding requirements of applications in environments such as quality control and in-line production control in the manufacturing industry.
Journal ArticleDOI
BWO Generators for Terahertz Dielectric Measurements
Gennady A. Komandin,S. V. Chuchupal,Sergey P. Lebedev,Yurii G. Goncharov,A. F. Korolev,O. E. Porodinkov,Igor E. Spektor,A. A. Volkov +7 more
TL;DR: In this paper, a universal magnetic focusing system on a permanent magnet with a protective housing shielding the magnetic field was developed for stable generation of radiation with a frequency of up to 2.1 THz without geometry change.
References
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