Amplification of UV radiation and gain mechanisms in ZnO films with loose-packed structure
The modern demands for miniaturization of optoelectronic devices, in particular, for the UV range, are inextricably linked with the improvement of fabrication technologies for the corresponding photonic nano/micro objects and the study of their radiative properties. In this work, the method of pyrol...
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Samara National Research University
2024-10-01
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| Series: | Компьютерная оптика |
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| Online Access: | https://www.computeroptics.ru/eng/KO/Annot/KO48-5/480508e.html |
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| author | L.A. Zadorozhnaya A.P. Tarasov A.S. Lavrikov V.M. Kanevsky |
| author_facet | L.A. Zadorozhnaya A.P. Tarasov A.S. Lavrikov V.M. Kanevsky |
| author_sort | L.A. Zadorozhnaya |
| collection | DOAJ |
| description | The modern demands for miniaturization of optoelectronic devices, in particular, for the UV range, are inextricably linked with the improvement of fabrication technologies for the corresponding photonic nano/micro objects and the study of their radiative properties. In this work, the method of pyrolytic carbothermal synthesis, which is a modification of the thermal evaporation method, was used to fabricate microcrystalline ZnO films with laser properties. The influence of the size and packing type of ZnO microcrystallites in the films on their emissive properties were revealed. The films with relatively large microcrystallites (10–15 µm in size on average) were found to exhibit UV amplified spontaneous emission at room temperature. The possibility of additional enhancement of this emission and its two-threshold behavior in loose-packed regions of such films were found for the first time. It was shown that the observed phenomenon is due to the competition between two gain mechanisms, which are assumed to arise predominantly in different regions of microcrystallites as a result of exciton-phonon and exciton-electron interaction processes. As the temperature decreases, the dominant gain mechanism gradually changes to exciton-exciton scattering, regardless of the type of film structure. The results obtained open up the possibilities of the thermal evaporation synthesis to a wider extent and can be useful in interpreting the optical gain mechanisms in ZnO micro- and nanostructures. |
| format | Article |
| id | doaj-art-9856fe30a2a3469dbe251280a69fb03e |
| institution | DOAJ |
| issn | 0134-2452 2412-6179 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Samara National Research University |
| record_format | Article |
| series | Компьютерная оптика |
| spelling | doaj-art-9856fe30a2a3469dbe251280a69fb03e2025-08-20T02:48:01ZengSamara National Research UniversityКомпьютерная оптика0134-24522412-61792024-10-0148569670410.18287/2412-6179-CO-1414Amplification of UV radiation and gain mechanisms in ZnO films with loose-packed structureL.A. Zadorozhnaya0A.P. Tarasov1A.S. Lavrikov2V.M. Kanevsky3Shubnikov Institute of Crystallography, Federal Scientific Research Centre "Crystallography and Photonics", NRC "Kurchatov Institute"Shubnikov Institute of Crystallography, Federal Scientific Research Centre "Crystallography and Photonics", NRC "Kurchatov Institute"Shubnikov Institute of Crystallography, Federal Scientific Research Centre "Crystallography and Photonics", NRC "Kurchatov Institute"Shubnikov Institute of Crystallography, Federal Scientific Research Centre "Crystallography and Photonics", NRC "Kurchatov Institute"The modern demands for miniaturization of optoelectronic devices, in particular, for the UV range, are inextricably linked with the improvement of fabrication technologies for the corresponding photonic nano/micro objects and the study of their radiative properties. In this work, the method of pyrolytic carbothermal synthesis, which is a modification of the thermal evaporation method, was used to fabricate microcrystalline ZnO films with laser properties. The influence of the size and packing type of ZnO microcrystallites in the films on their emissive properties were revealed. The films with relatively large microcrystallites (10–15 µm in size on average) were found to exhibit UV amplified spontaneous emission at room temperature. The possibility of additional enhancement of this emission and its two-threshold behavior in loose-packed regions of such films were found for the first time. It was shown that the observed phenomenon is due to the competition between two gain mechanisms, which are assumed to arise predominantly in different regions of microcrystallites as a result of exciton-phonon and exciton-electron interaction processes. As the temperature decreases, the dominant gain mechanism gradually changes to exciton-exciton scattering, regardless of the type of film structure. The results obtained open up the possibilities of the thermal evaporation synthesis to a wider extent and can be useful in interpreting the optical gain mechanisms in ZnO micro- and nanostructures.https://www.computeroptics.ru/eng/KO/Annot/KO48-5/480508e.htmlzno filmloose-packed structureuv laseramplified spontaneous emissionemission enhancement |
| spellingShingle | L.A. Zadorozhnaya A.P. Tarasov A.S. Lavrikov V.M. Kanevsky Amplification of UV radiation and gain mechanisms in ZnO films with loose-packed structure Компьютерная оптика zno film loose-packed structure uv laser amplified spontaneous emission emission enhancement |
| title | Amplification of UV radiation and gain mechanisms in ZnO films with loose-packed structure |
| title_full | Amplification of UV radiation and gain mechanisms in ZnO films with loose-packed structure |
| title_fullStr | Amplification of UV radiation and gain mechanisms in ZnO films with loose-packed structure |
| title_full_unstemmed | Amplification of UV radiation and gain mechanisms in ZnO films with loose-packed structure |
| title_short | Amplification of UV radiation and gain mechanisms in ZnO films with loose-packed structure |
| title_sort | amplification of uv radiation and gain mechanisms in zno films with loose packed structure |
| topic | zno film loose-packed structure uv laser amplified spontaneous emission emission enhancement |
| url | https://www.computeroptics.ru/eng/KO/Annot/KO48-5/480508e.html |
| work_keys_str_mv | AT lazadorozhnaya amplificationofuvradiationandgainmechanismsinznofilmswithloosepackedstructure AT aptarasov amplificationofuvradiationandgainmechanismsinznofilmswithloosepackedstructure AT aslavrikov amplificationofuvradiationandgainmechanismsinznofilmswithloosepackedstructure AT vmkanevsky amplificationofuvradiationandgainmechanismsinznofilmswithloosepackedstructure |