Arthur T Knackerbracket has found the following story:
Terahertz radiation is used for security checks at airports, for medical examinations and also for quality checks in industry. However, radiation in the terahertz range is extremely difficult to generate. Scientists at TU Wien have now succeeded in developing a terahertz radiation source that breaks several records: it is extremely efficient, and its spectrum is very broad—it generates different wavelengths from the entire terahertz range. This opens up the possibility of creating short radiation pulses with extremely high radiation intensity. The new terahertz technology has now been presented in the journal Nature Communications.
More information: Anastasios D. Koulouklidis et al. Observation of extremely efficient terahertz generation from mid-infrared two-color laser filaments, Nature Communications (2020). DOI: 10.1038/s41467-019-14206-x
Journal information: Nature Communications
(Score: 2) by FatPhil on Tuesday January 21 2020, @09:28AM
orders of magnitude more than can be achieved with other methods. This results in exceptionally high THz energies of almost 200 µJ
https://phys.org/news/2017-10-liquids-terahertz.html :
In their experiments, they irradiated common laboratory liquids like methanol, acetone, dicholorethane, carbon disulphide and even water, with moderate energy femtosecond laser pulses, ionizing the liquid and forming long plasma channels called filaments. They measured energies as high as 50 microjoules, thousands of times larger than the energies emitted by most existing sources and 10 to 20 times larger than those produced from air.
Looks like they've massively improved on prior in-air results, but they were already inferior.
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