24-26 November 2022
Taras Shevchenko National University of Kyiv and Shizuoka University
Europe/Kiev timezone

Population dynamics in ionized nitrogen molecule: evidence of laser without inversion

25 Nov 2022, 15:00
15m
Hybrid (Taras Shevchenko National University of Kyiv and Shizuoka University)

Hybrid

Taras Shevchenko National University of Kyiv and Shizuoka University

3 Chome-5-1 Johoku, Naka Ward, Hamamatsu, Shizuoka 432-8011

Speaker

Dr Rostyslav Danylo (Laboratoire d'Optique Appliquée)

Description

A nitrogen gas pumped by near-infrared femtosecond pulses gives rise to a coherent emission at 391.4 nm due to transitions between ionic levels. For the first time, we experimentally analyze the temporal evolution of the populations of N$_2^+$ levels involved in this lasing process. To visualize this dynamics, we measure the transmission of a high harmonics source through N$_2^+$.

Contact Email address rostyslav.danylo@ensta-paris.fr

Primary author

Dr Rostyslav Danylo (Laboratoire d'Optique Appliquée)

Co-authors

Dr Guillaume Lambert (Laboratoire d'Optique Appliquée) Mr Mykyta Redkin Mr Xiang Zhang (University of Shanghai for Science and technology) Dr Aurélien Houard (Laboratoire d'Optique Appliquée) Prof. Yi Liu (University of Shanghai for Science and Technology) Prof. Vladimir Tikhonchuk (Université de Bordeaux) Prof. André Mysyrowicz (Laboratoire d'Optique Appliquée)

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