Open AccessProduction of Terahertz Radiations by Short Pulse Lasers
Author(s) -
Sandeep Kumar,
Niti Kant,
Shivani Vij,
Alka Mehta,
Vishal Thakur
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1531/1/012011
Subject(s) - ponderomotive force , filamentation , electric field , laser , ripple , physics , excitation , femtosecond , plasma , terahertz radiation , transverse plane , atomic physics , optics , voltage , structural engineering , quantum mechanics , engineering
In this paper, we develop an analytical formalism for THz generation from Laser filaments in the presence of static electric field in the magnetized collisional plasma. Two femtosecond laser pulses with different frequencies undergo filamentation in magnetized collisional plasma to have non-linear coupling in the presence of transverse static electric field. This results in balancing action of static ponderomotive force with pressure gradient force and forms transverse density ripple and non-linear ponderomotive force couple with density ripple to provide strong non-linear transverse current which results in excitation of THz Radiations at resonance. This coupling is further enhanced by electric static field.