Lasing without population inversion in N.sup.+./sup..sub.2./sub.

0521641 - FZÚ 2020 RIV US eng J - Článek v odborném periodiku
Mysyrowicz, A. - Danylo, R. - Houard, A. - Tikhonchuk, Vladimir - Zhang, X. - Fan, Z. - Liang, Q. - Zhuang, S. - Yuan, L. - Liu, Y.
Lasing without population inversion in N⁺₂.
APL Photonics. Roč. 4, č. 11 (2019), s. 1-6, č. článku 110807. ISSN 2378-0967. E-ISSN 2378-0967
Grant CEP: GA MŠMT EF16_013/0001793
Grant ostatní: OP VVV - ELITAS(XE) CZ.02.1.01/0.0/0.0/16_013/0001793
Institucionální podpora: RVO:68378271
Klíčová slova: coherent polarization * Maxwell-Bloch equation * population inversions * pressure dependence * short intense laser pulse
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 4.864, rok: 2019
Způsob publikování: Open access

We experimentally demonstrate the existence of long-lived coherent polarizations coupling simultaneously ground state X (X2Σ+g ) to excited states A (A2Πu) and B (B2Σ+u) of N+2 inside a plasma created by a short intense laser pulse at 800 nm. This three-level V-scheme arrangement is responsible for a strong optical gain without population inversion at the B–X transition at 391.4 nm. Simulations based on Maxwell-Bloch equations reproduce well the kinetics and the pressure dependence of the gain.
Trvalý link: http://hdl.handle.net/11104/0306233