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Pré-Publication, Document De Travail Année : 2022

Multiple-Photon Resonance Enabled Quantum Interference in Emission Spectroscopy of N_2^+

Xiang Zhang
Qi Lu
  • Fonction : Auteur
Yalei Zhu
  • Fonction : Auteur
Jing Zhao
  • Fonction : Auteur
  • PersonId : 781753
  • IdRef : 151496838
Rostyslav Danylo
Mingwei Lei
  • Fonction : Auteur
Hongbing Jiang
  • Fonction : Auteur
Chengyin Wu
  • Fonction : Auteur
Zhedong Zhang
  • Fonction : Auteur
André Mysyrowicz
Qihuang Gong
  • Fonction : Auteur
Songlin Zhuang
  • Fonction : Auteur
Zengxiu Zhao
  • Fonction : Auteur
Yi Liu
  • Fonction : Auteur

Résumé

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 demonstrate 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 (FID) arising from quantum radiation and molecular cooperativity. These findings clarify the mechanism of coherent emission of nitrogen ions pumped with MIR pump laser and are likely 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.

Dates et versions

hal-03683136 , version 1 (31-05-2022)

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Xiang Zhang, Qi Lu, Yalei Zhu, Jing Zhao, Rostyslav Danylo, et al.. Multiple-Photon Resonance Enabled Quantum Interference in Emission Spectroscopy of N_2^+. 2022. ⟨hal-03683136⟩
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