Coherent modulation of superradiance from nitrogen ions pumped with femtosecond pulses

Zhang, An; Liang, Qi; Lei, Mingwei; Yuan, Luqi; Liu, Yi; Fan, Zhiyuan; Zhang, Xiang; Zhuang, Songlin; Wu, Chengyin; Gong, Qihuang; Hong-bing, Jiang

doi:10.1364/oe.27.012638

Cited by 42 publications

(26 citation statements)

References 29 publications

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“…The period of the modulation is found to be around 1.3 fs, corresponding to a wavelength of 391.5 nm. This observed modulation agrees well with the wavelength of the transition from

B^{2} {normalΣ}_{u}^{+} false(v^{'} = 0 false)

X^{2} {normalΣ}_{g}^{+} false(v = 0 false)

transition, and therefore confirms unambiguously the presence and importance of the macroscopic quantum coherence between the

B^{2} {normalΣ}_{u}^{+}

and

X^{2} {normalΣ}_{g}^{+}

states in the N

_{2}^{+}

lasing process …”

Section: Molecular Nitrogen Ion Lasingsupporting

confidence: 82%

“…In the N

_{2}^{+}

lasing, the quantum coherence not only brings strong nonlinear effects, but also leads to the superradiant emission and also the coherent control, which have been observed with N

_{2}^{+}

ions.…”

Section: Molecular Nitrogen Ion Lasingmentioning

confidence: 95%

Section: Molecular Nitrogen Ion Lasingmentioning

confidence: 99%

“…Therefore, the process of the N

_{2}^{+}

lasing spans over different timescales and hence provides a versatile platform for investigating molecular dynamics, ultrafast nonlinear phenomena, and quantum optics in the system of molecular ions . On the other hand, the understanding of the gain mechanism in N

_{2}^{+}

lasing is highly desired in the strong‐field‐ionization framework, which has motivated many tentative and interesting explanations . Up to now, it is still lack of a complete physical picture to explain all key experimental observations on N

_{2}^{+}

lasing.…”

Section: Molecular Nitrogen Ion Lasingmentioning

confidence: 99%

“…One key feature of superradiance is the formation of the macroscopic quantum coherence inside the media between the corresponding energy levels . To probe the presence of the macroscopic coherence in the N

_{2}^{+}

lasing process, two experiments have been performed . In one experiment, to address the quantum coherence between the

B^{2} {normalΣ}_{u}^{+}

and

X^{2} {normalΣ}_{g}^{+}

states, two seeding pulses at 391 nm have been injected into the plasma, after the passage of the intense pump pulse at 800 nm.…”

Section: Molecular Nitrogen Ion Lasingmentioning

confidence: 99%

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Recent Advances in Air Lasing: A Perspective from Quantum Coherence

et al. 2019

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The research topic of air lasing is of fundamental and practical importance, which has grown rapidly in the past decade. Air lasing, or a laser‐like emission from air species including atomic oxygen, atomic argon, atomic nitrogen, molecular nitrogen, and molecular nitrogen ions, has been investigated vastly in both experiment and theory. In this review, the basic concepts of air lasing are discussed and the crucial role of quantum coherence in the air‐lasing process is highlighted. As an exciting perspective, air lasing not only exhibits important fundamental physics such as superradiance, nonlinear effects, vibrational and rotational dynamics, but also shows potential practical implications toward remote sensing.

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“…The period of the modulation is found to be around 1.3 fs, corresponding to a wavelength of 391.5 nm. This observed modulation agrees well with the wavelength of the transition from

B^{2} {normalΣ}_{u}^{+} false(v^{'} = 0 false)

X^{2} {normalΣ}_{g}^{+} false(v = 0 false)

transition, and therefore confirms unambiguously the presence and importance of the macroscopic quantum coherence between the

B^{2} {normalΣ}_{u}^{+}

and

X^{2} {normalΣ}_{g}^{+}

states in the N

_{2}^{+}

lasing process …”

Section: Molecular Nitrogen Ion Lasingsupporting

confidence: 82%

“…In the N

_{2}^{+}

lasing, the quantum coherence not only brings strong nonlinear effects, but also leads to the superradiant emission and also the coherent control, which have been observed with N