Light Hole Excitons in Strain-Coupled Bilayer Quantum Dots with Small Fine-Structure Splitting
| Autor: | Xiangjun Shang, Hanqing Liu, Xiangbin Su, Shulun Li, Huiming Hao, Deyan Dai, Zesheng Chen, Haiqiao Ni, Zhichuan Niu |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Crystals, Vol 12, Iss 8, p 1116 (2022) |
| Druh dokumentu: | article |
| ISSN: | 12081116 2073-4352 |
| DOI: | 10.3390/cryst12081116 |
| Popis: | In this work, we measure polarization-resolved photoluminescence spectra from excitonic complexes in tens of single InAs/GaAs quantum dots (QDs) at the telecom O-band with strain-coupled bilayer structure. QDs often show fine-structure splitting (FSS) ~100 μeV in uniform anisotropy and valence-band mixing of heavy holes (HH) and light holes (LH); the biaxial strain also induces LH excitons with small FSS (especially XX, hh and enhances population on LH excitons XX, XX11, X11+ and XX21+. |
| Databáze: | Directory of Open Access Journals |
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