High-temperature electron-hole liquid and dynamics of fermi excitons in a in0.65al0.35as/al0.4ga0.6as quantum dot array
文献类型：期刊论文
| 作者 | Ding, CR; Wang, HZ; Xu, B |
| 刊名 | Physical review b
 |
| 出版日期 | 2005-02-01 |
| 卷号 | 71期号:8页码:6 |
| ISSN号 | 1098-0121 |
| DOI | 10.1103/physrevb.71.085304 |
| 通讯作者 | Wang, hz(stswhz@zsu.edu.cn) |
| 英文摘要 | State-filling effects of the exciton in a in0.65al0.35as/al0.4ga0.6as quantum dot array are observed by quantum dot array photolumineseence at a sample temperature of 77 k. the exciton emission at low excitation density is dominated by the radiative recombination of the states in the s shell and at high excitation density the emission mainly results from the radiative recombination of the exciton state in the p shell. the spectral interval between the states in the s and p shells is about 30-40 mcv. the time resolved photoluminescence shows that the decay time of exciton states in the p shell is longer than that of exciton states in the s shell, and the emission intensity of the exciton state in the p shell is superlinearly dependent on excitation density. furthermore, electron-hole liquid in the quantum dot array is observed at 77 k, which is a much higher temperature than that in bulk. the emission peak of the. recombination, of electron-hole liquid has an about 200 mev redshift from the exciton fluorescence. two excitation density-dependent emission peaks at 1.56 and 1.59 ev are observed, respectively, which result from quantum confinement effects in qds. the emission intensity of electron-hole liquid is directly proportional to the cubic of excitation densities and its decay time decreases significantly at the high excitation density. |
| WOS关键词 | DROPLET FORMATION ; ROOM-TEMPERATURE ; ENERGY-LEVELS ; GAP ; NANOSTRUCTURES ; SPECTROSCOPY ; ALXGA1-XAS ; PHASE ; SI |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Condensed Matter |
| 语种 | 英语 |
| 出版者 | AMERICAN PHYSICAL SOC |
| WOS记录号 | WOS:000228065300046 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2426436 |
| 专题 | 半导体研究所 |
| 通讯作者 | Wang, HZ |
| 作者单位 | 1.Zhongshan Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Peoples R China 2.Chinese Acad Sci, Inst Semicond, Key Lab Semicond Mat Sci, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ding, CR,Wang, HZ,Xu, B. High-temperature electron-hole liquid and dynamics of fermi excitons in a in0.65al0.35as/al0.4ga0.6as quantum dot array[J]. Physical review b,2005,71(8):6. |
| APA | Ding, CR,Wang, HZ,&Xu, B.(2005).High-temperature electron-hole liquid and dynamics of fermi excitons in a in0.65al0.35as/al0.4ga0.6as quantum dot array.Physical review b,71(8),6. |
| MLA | Ding, CR,et al."High-temperature electron-hole liquid and dynamics of fermi excitons in a in0.65al0.35as/al0.4ga0.6as quantum dot array".Physical review b 71.8(2005):6. |
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来源：半导体研究所
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