Strong-field-induced N2+ lasing by phase control of free induction decay

被引：4

作者：

Wang, Siqi ^{[1
]}

Fu, Yao ^{[1
]}

Lotstedt, Erik ^{[2
]}

Cao, Jincheng ^{[1
]}

Zang, Hongwei ^{[1
]}

Li, Helong ^{[1
,3
]}

Yamanouchi, Kaoru ^{[2
]}

Xu, Huailiang ^{[1
]}

机构：

[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China

[2] Univ Tokyo, Sch Sci, Dept Chem, 7-3-1 Hongo,Bunkyo Ku, Tokyo 1130033, Japan

[3] Jilin Univ, Inst Atom & Mol Phys, Changchun 130012, Peoples R China

来源：

PHYSICAL REVIEW A | 2023年 / 108卷 / 03期

基金：

中国国家自然科学基金;

关键词：

LASER; FILAMENTS;

D O I：

10.1103/PhysRevA.108.033113

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We prepare N-2(+) mostly in the vibrational ground X-2 Sigma(+)(g) state by an ultraviolet 267-nm pulse and create the free induction decay (FID) of the B-2 Sigma(+)(u) - X-2 Sigma(+)(g)(0, 0) transition at 391 nm by a resonant excitation pulse. By controlling the phase shift of the FID using a near-IR control pulse through the dynamical Stark effect and rotational coherence, we reveal that the absorption spectrum of this transition, exhibiting a Lorentzian absorption profile, can be changed into a Fano-type profile, and then, a Lorentzian emission profile, resulting in N-2(+) lasing. Our results shed light on the long-term controversy over the mechanism of strong-field-induced N-2(+) lasing and reveal a general route to achieving amplification of light resonantly interacting with molecular ions without population inversion.

引用

页数：7