Amplified spontaneous emission without population inversion in potassium vapour by internally generated fields
| dc.contributor.author | Merlemis, N. | en |
| dc.contributor.author | Lyras, A. | en |
| dc.contributor.author | Katharakis, M. | en |
| dc.contributor.author | Efthimiopoulos, T. | en |
| dc.date.accessioned | 2015-11-24T18:33:04Z | |
| dc.date.available | 2015-11-24T18:33:04Z | |
| dc.identifier.issn | 0953-4075 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/16686 | |
| dc.rights | Default Licence | - |
| dc.subject | electromagnetically induced transparency | en |
| dc.subject | nonlinear optical processes | en |
| dc.subject | quantum-interference | en |
| dc.subject | stimulated emissions | en |
| dc.subject | sodium vapor | en |
| dc.subject | light | en |
| dc.subject | gain | en |
| dc.subject | amplification | en |
| dc.subject | suppression | en |
| dc.subject | states | en |
| dc.title | Amplified spontaneous emission without population inversion in potassium vapour by internally generated fields | en |
| heal.abstract | We report the experimental observation of the amplified spontaneous emission (ASE) generated at the 4P(3/2)-4S(1/2) transition of potassium atoms following the excitation of the 4S(1/2)-6S(1/2) two-photon transition. We propose that the amplification of the observed radiation is inversionless, due to driving fields on neighbouring transitions that are not imposed externally, but are internally generated in the medium. A theoretical model based on the density operator formalism is presented, which confirms that the radiation observed in the 4P(3/2)-4S(1/2) transition is generated without population inversion for a broad range of the parameters used. It seems that a self-generated ladder scheme is the dominant mechanism, but other schemes are also examined and compared with the experimental results in order to assess their impact on the generation of the inversionless 4P(3/2)-4S(1/2) emission. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.secondary | <Go to ISI>://000237836400013 | - |
| heal.identifier.secondary | http://iopscience.iop.org/0953-4075/39/8/009/pdf/0953-4075_39_8_009.pdf | - |
| heal.journalName | Journal of Physics B-Atomic Molecular and Optical Physics | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 2006 | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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