| Autor: |
Peter M Solyankin, Irina A Nikolaeva, Andrey A Angeluts, Daniil E Shipilo, Nikita V Minaev, Nikolay A Panov, Alexei V Balakin, Yiming Zhu, Olga G Kosareva, Alexander P Shkurinov |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
New Journal of Physics, Vol 22, Iss 1, p 013039 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
1367-2630 |
| DOI: |
10.1088/1367-2630/ab60f3 |
| Popis: |
The present paper studies the generation of terahertz (THz) radiation in CO _2 in comparison with atmospheric air at a wide range of pressures. We established experimentally and explained theoretically that for these gases there are optimal pressures at about 1 bar for air and 0.5 bar for CO _2 under which the efficiency of conversion from near-infrared to THz frequencies is the highest. We consider the possibility of applying femtosecond laser-induced THz generation for the study of the atmosphere of Mars and found that the overall THz yield near the surface of Mars is just a factor of 6 lower than on Earth. Comparable THz energy on the two planets is associated with underdense plasma on Earth (∼10% of neutrals) and full double ionization of carbon dioxide on Mars (∼200% of neutrals), the latter opening great perspective for THz remote sensing of trace gases in the Martian atmosphere. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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