Stimulated emission through an electron–hole plasma in colloidal CdSe quantum rings
| العنوان: | Stimulated emission through an electron–hole plasma in colloidal CdSe quantum rings |
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| المؤلفون: | Rodà, Carmelita, Salzmann, Bastiaan B. V., Wagner, Isabella, Ussembayev, Yera, Chen, Kai, Hodgkiss, Justin M., Neyts, Kristiaan, Moreels, Iwan, Vanmaekelbergh, Daniel, Geiregat, Pieter, Sub Condensed Matter and Interfaces, Condensed Matter and Interfaces |
| المساهمون: | Sub Condensed Matter and Interfaces, Condensed Matter and Interfaces |
| المصدر: | NANO LETTERS Nano Letters, 21(23), 10062. American Chemical Society |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | spectroscopy, Materials science, Technology and Engineering, Band gap, NANOPLATELETS, Exciton, stimulated emission, RECOMBINATION, Bioengineering, RELAXATION, 02 engineering and technology, Electron hole, 010402 general chemistry, 7. Clean energy, 01 natural sciences, Molecular physics, Nanomaterials, quantum rings, nanostructures, General Materials Science, Stimulated emission, ANNIHILATION, Quantum, SPECTROSCOPY, nanostructures 2D materials spectroscopy stimulated emission quantum rings, Mechanical Engineering, Plasma, General Chemistry, 021001 nanoscience & nanotechnology, 2D materials, Condensed Matter Physics, LIGHT-ABSORPTION, 0104 chemical sciences, Chemistry, Physics and Astronomy, BAND-GAP RENORMALIZATION, BOTTLENECK, Charge carrier, PHOTOLUMINESCENCE, GAIN, 0210 nano-technology |
| الوصف: | Colloidal CdSe quantum rings (QRs) are a recently developed class of nanomaterials with a unique topology. In nanocrystals with more common shapes, such as dots and platelets, the photophysics is consistently dominated by strongly bound electron-hole pairs, so-called excitons, regardless of the charge carrier density. Here, we show that charge carriers in QRs condense into a hot uncorrelated plasma state at high density. Through strong band gap renormalization, this plasma state is able to produce broadband and sizable optical gain. The gain is limited by a second-order, yet radiative, recombination process, and the buildup is counteracted by a charge-cooling bottleneck. Our results show that weakly confined QRs offer a unique system to study uncorrelated electron-hole dynamics in nanoscale materials. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1530-6984 1530-6992 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::035a3009fdaa39d3457a9d64db32e8ecTest https://biblio.ugent.be/publication/8728111/file/8743722Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....035a3009fdaa39d3457a9d64db32e8ec |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15306984 15306992 |
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