| Download | - View final version: Rotational quantum beat lasing without inversion (PDF, 2.9 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1364/OPTICA.390665 |
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| Author | Search for: Richter, Maria; Search for: Lytova, Marianna1; Search for: Morales, Felipe; Search for: Haessler, Stefan; Search for: Smirnova, Olga; Search for: Spanner, Michael1; Search for: Ivanov, Misha |
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| Affiliation | - National Research Council of Canada. Security and Disruptive Technologies
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| Format | Text, Article |
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| Abstract | In standard lasers, light amplification requires population inversion between an upper and a lower state to break the reciprocity between absorption and stimulated emission. However, in a medium prepared in a specific superposition state, quantum interference may fully suppress absorption while leaving stimulated emission intact, opening the possibility of lasing without inversion. Here we show that lasing without inversion arises naturally during propagation of intense femtosecond laser pulses in air. It is triggered by the combination of molecular ionization and molecular alignment, both unavoidable in intense light fields. The effect could enable inversionless amplification of broadband radiation in many molecular gases, opening unusual opportunities for remote sensing. |
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| Publication date | 2020-05-27 |
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| Publisher | Optical Society of America |
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| Licence | |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | c6898667-b632-46e6-8d9c-8062b87866fc |
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| Record created | 2021-05-12 |
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| Record modified | 2021-05-14 |
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