Spatio-spectral distribution of THz radiation generated by two-color femtosecond laser breakdown in air is investigated theoretically. The theoretical model is based on the fast oscillating light field propagation and self-consistent free electron generation process. We find that the THz emission spectrum has both the low-frequency component related to the transient photocurrent with the maximum spectral intensity at ∼1 THz, and the high-frequency component at ∼10 THz related to the nonlinear response of bound electrons.
|Original language||English (US)|
|Title of host publication||Millimetre Wave and Terahertz Sensors and Technology VIII|
|Editors||Neil A. Salmon, Eddie L. Jacobs|
|State||Published - 2015|
|Event||Millimetre Wave and Terahertz Sensors and Technology VIII - Toulouse, France|
Duration: Sep 22 2015 → …
|Name||Proceedings of SPIE - The International Society for Optical Engineering|
|Other||Millimetre Wave and Terahertz Sensors and Technology VIII|
|Period||9/22/15 → …|
Bibliographical noteFunding Information:
We thank RFBR (15-02-99630, 14-02-31379), the Council of RF President for Support of Young Sci- entists (MK-4895.2014.2), RF President Grant for Leading Scientific Schools (NSh-3796.2014.2), Dynasty Foundation.
- Four-wave mixing
- THz radiation