TY - JOUR
T1 - Multiple-Photon Resonance Enabled Quantum Interference in Emission Spectroscopy of + 2
AU - Zhang, Xiang
AU - Lu, Qi
AU - Zhu, Ya Lei
AU - Zhao, Jing
AU - Danylo, Rostyslav
AU - Xu, Liang
AU - Lei, Mingwei
AU - Jiang, Hongbing
AU - Wu, Chengyin
AU - Zhang, Zhedong
AU - Houard, Aurélien
AU - Tikhonchuk, Vladimir
AU - Mysyrowicz, André
AU - Gong, Qihuang
AU - Zhuang, Songlin
AU - Zhao, Zengxiu
AU - Liu, Yi
N1 - Publisher Copyright:
© 2024 Xiang Zhang et al.
PY - 2024/1/1
Y1 - 2024/1/1
N2 - Quantum interference occurs frequently in the interaction of laser radiation with materials, leading to a series of fascinating effects such as lasing without inversion, electromagnetically induced transparency, Fano resonance, etc. Such quantum interference effects are mostly enabled by single-photon resonance with transitions in the matter, regardless of how many optical frequencies are involved. Here, we report on quantum interference driven by multiple photons in the emission spectroscopy of nitrogen ions that are resonantly pumped by ultrafast infrared laser pulses. In the spectral domain, Fano resonance is observed in the emission spectrum, where a laser-assisted dynamic Stark effect creates the continuum. In the time domain, the fast-evolving emission is measured, revealing the nature of free-induction decay arising from quantum radiation and molecular cooperativity. These findings clarify the mechanism of coherent emission of nitrogen ions pumped with mid-infrared pump laser and are found to be universal. The present work opens a route to explore the important role of quantum interference during the interaction of intense laser pulses with materials near multiple photon resonance.
AB - Quantum interference occurs frequently in the interaction of laser radiation with materials, leading to a series of fascinating effects such as lasing without inversion, electromagnetically induced transparency, Fano resonance, etc. Such quantum interference effects are mostly enabled by single-photon resonance with transitions in the matter, regardless of how many optical frequencies are involved. Here, we report on quantum interference driven by multiple photons in the emission spectroscopy of nitrogen ions that are resonantly pumped by ultrafast infrared laser pulses. In the spectral domain, Fano resonance is observed in the emission spectrum, where a laser-assisted dynamic Stark effect creates the continuum. In the time domain, the fast-evolving emission is measured, revealing the nature of free-induction decay arising from quantum radiation and molecular cooperativity. These findings clarify the mechanism of coherent emission of nitrogen ions pumped with mid-infrared pump laser and are found to be universal. The present work opens a route to explore the important role of quantum interference during the interaction of intense laser pulses with materials near multiple photon resonance.
U2 - 10.34133/ultrafastscience.0051
DO - 10.34133/ultrafastscience.0051
M3 - Article
AN - SCOPUS:85186199688
SN - 2097-0331
VL - 4
JO - Ultrafast Science
JF - Ultrafast Science
M1 - 0051
ER -