Optical absorption on exciton states in nanosystems with germanium quantum dots
A theory of optical absorption on surface exciton states with spatially separated electrons and holes has been developed (the hole moves in a germanium quantum dot, and the electron is localized at the spherical interface of the silicon quantum dot matrix). A gigantic increase in polarizabilities (b...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-06-01
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| Series: | Chemical Physics Impact |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2667022425000271 |
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| author | Serhii I. Pokutnii |
| author_facet | Serhii I. Pokutnii |
| author_sort | Serhii I. Pokutnii |
| collection | DOAJ |
| description | A theory of optical absorption on surface exciton states with spatially separated electrons and holes has been developed (the hole moves in a germanium quantum dot, and the electron is localized at the spherical interface of the silicon quantum dot matrix). A gigantic increase in polarizabilities (by five orders of magnitude) and absorption cross- sections (by eleven orders of magnitude) due to optical interband transitions between these exciton states has been theoretically predicted. This opens up the possibility of applied nanosystems as new highly absorbing nanomaterials in the infrared range. |
| format | Article |
| id | doaj-art-f63a794798b245339d8151785c413938 |
| institution | Kabale University |
| issn | 2667-0224 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Chemical Physics Impact |
| spelling | doaj-art-f63a794798b245339d8151785c4139382025-02-02T05:29:28ZengElsevierChemical Physics Impact2667-02242025-06-0110100839Optical absorption on exciton states in nanosystems with germanium quantum dotsSerhii I. Pokutnii0Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, 17 Olega Mudraka Str., Kyiv 03164, Ukraine; Institute of Physics of National Academy of Sciences of Ukraine, 46 Nauky Ave., Kyiv 03028, UkraineA theory of optical absorption on surface exciton states with spatially separated electrons and holes has been developed (the hole moves in a germanium quantum dot, and the electron is localized at the spherical interface of the silicon quantum dot matrix). A gigantic increase in polarizabilities (by five orders of magnitude) and absorption cross- sections (by eleven orders of magnitude) due to optical interband transitions between these exciton states has been theoretically predicted. This opens up the possibility of applied nanosystems as new highly absorbing nanomaterials in the infrared range.http://www.sciencedirect.com/science/article/pii/S2667022425000271Spatially indirect excitonsPolarizabilityAbsorption cross-sectionsOptical interband transitionsQuantum dots |
| spellingShingle | Serhii I. Pokutnii Optical absorption on exciton states in nanosystems with germanium quantum dots Chemical Physics Impact Spatially indirect excitons Polarizability Absorption cross-sections Optical interband transitions Quantum dots |
| title | Optical absorption on exciton states in nanosystems with germanium quantum dots |
| title_full | Optical absorption on exciton states in nanosystems with germanium quantum dots |
| title_fullStr | Optical absorption on exciton states in nanosystems with germanium quantum dots |
| title_full_unstemmed | Optical absorption on exciton states in nanosystems with germanium quantum dots |
| title_short | Optical absorption on exciton states in nanosystems with germanium quantum dots |
| title_sort | optical absorption on exciton states in nanosystems with germanium quantum dots |
| topic | Spatially indirect excitons Polarizability Absorption cross-sections Optical interband transitions Quantum dots |
| url | http://www.sciencedirect.com/science/article/pii/S2667022425000271 |
| work_keys_str_mv | AT serhiiipokutnii opticalabsorptiononexcitonstatesinnanosystemswithgermaniumquantumdots |