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https://olympias.lib.uoi.gr/jspui/handle/123456789/17204Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Armyras, A. | en |
| dc.contributor.author | Pentaris, D. | en |
| dc.contributor.author | Efthimiopoulos, T. | en |
| dc.contributor.author | Merlemis, N. | en |
| dc.contributor.author | Lyras, A. | en |
| dc.date.accessioned | 2015-11-24T18:37:43Z | - |
| dc.date.available | 2015-11-24T18:37:43Z | - |
| dc.identifier.issn | 0953-4075 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/17204 | - |
| dc.rights | Default Licence | - |
| dc.subject | internally generated fields | en |
| dc.subject | quantum-interference | en |
| dc.subject | emissions | en |
| dc.subject | resonance | en |
| dc.subject | vapor | en |
| dc.title | Saturation and population transfer of a two-photon excited four-level potassium atom | en |
| heal.type | journalArticle | - |
| heal.type.en | Journal article | en |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.identifier.primary | Doi 10.1088/0953-4075/44/16/165401 | - |
| heal.identifier.secondary | <Go to ISI>://000294890800021 | - |
| heal.identifier.secondary | http://iopscience.iop.org/0953-4075/44/16/165401/pdf/0953-4075_44_16_165401.pdf | - |
| heal.language | en | - |
| heal.access | campus | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών | el |
| heal.publicationDate | 2011 | - |
| heal.abstract | A theoretical study of the nonlinearity reduction in a four-level system of a potassium atom in the presence of a strong nanosecond laser field, which excites the transition |4(S1 2)> <-> |6S(1/2)> with two photons, is presented. It is shown that the destructive quantum interference between the laser field and the internally generated radiations results in a linear response of the atomic path-1 (|4S(1/2)> <->| 6S1/2 <-> |5P(3/2)> |4S(1/2)>) emitted parametric fields. For sufficiently high laser intensities and/or atomic densities, the path-1 emitted fields are driven into saturation, a regime accompanied by a substantial population redistribution among the states. Reasonable agreement between earlier experimental results and the theoretical ones is obtained. It is also shown that upon saturation of path-1, for low atomic density, the path-2 (|4S(1/2)> <-> |6S(1/2)> <-> | 4P(3/2)> <-> |4S(1/)2 >) is activated. A subtle interplay between laser intensity and atomic density may determine the activation of path-2. Also, it is shown that the path-2 emission |6S(1/2)> <-> |4P3/2 > is an amplified spontaneous emission process which induces a |4P(3/2) > <-> |4S(1/2)> emission, without population inversion, in a cascade scheme. | en |
| heal.journalName | Journal of Physics B-Atomic Molecular and Optical Physics | en |
| heal.journalType | peer reviewed | - |
| heal.fullTextAvailability | TRUE | - |
| Appears in Collections: | Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά) | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Armyras-2011-Saturation and popul.pdf | 1.46 MB | Adobe PDF | View/Open Request a copy |
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