Room-Temperature Electron Spin Generation by Femtosecond Laser Pulses in Colloidal CdS Quantum Dots
文献类型：期刊论文
| 作者 | Tong, Haifang; Feng, Donghai; Li, Xiao; Deng, Li; Leng, Yuxin; Jia, Tianqing; Sun, Zhenrong |
| 刊名 | materials
 |
| 出版日期 | 2013 |
| 卷号 | 6期号:10页码:4523 |
| 通讯作者 | feng, dh (reprint author), e china normal univ, state key lab precis spect, shanghai 200062, peoples r china. |
| 英文摘要 | we present an experimental investigation of optical spin orientation in colloidal cds quantum dots (qds) by a femtosecond laser pulse at room temperature. the spin carrier and its spin-generation process are clarified. firstly, the observed spin signals of cds qds in time-resolved faraday rotation measurements are shown to belong to electron carriers, by comparing the spin dephasing dynamics and lande g factor between cds qds and bulk materials. secondly, spin dynamics unaffected by the faster carrier recombination suggests that the spin-polarized electrons are not photoexcited but resident in the dots. moreover, hole spins should dephase very fast compared with electron spins, otherwise the trion (two electrons with opposite spin orientations and one hole) recombination process will affect the resident electron spin signals. the electron spin is generated in a short time of which the excitation light is absorbed and the resident electron is excited to trion states, i.e., of pulse durations. due to fast hole spin dephasing, trion recombination gives null spin signals, and the subsequent electron spin dynamics is controlled by its intrinsic mechanisms. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 版本 | 出版稿 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/14709]  |
| 专题 | 上海光学精密机械研究所_强场激光物理国家重点实验室 |
| 作者单位 | 1.[Tong, Haifang 2.Feng, Donghai 3.Li, Xiao 4.Deng, Li 5.Jia, Tianqing 6.Sun, Zhenrong] E China Normal Univ, State Key Lab Precis Spect, Shanghai 200062, Peoples R China 7.[Leng, Yuxin] Chinese Acad Sci, State Key Lab High Field Laser Phys, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tong, Haifang,Feng, Donghai,Li, Xiao,et al. Room-Temperature Electron Spin Generation by Femtosecond Laser Pulses in Colloidal CdS Quantum Dots[J]. materials,2013,6(10):4523. |
| APA | Tong, Haifang.,Feng, Donghai.,Li, Xiao.,Deng, Li.,Leng, Yuxin.,...&Sun, Zhenrong.(2013).Room-Temperature Electron Spin Generation by Femtosecond Laser Pulses in Colloidal CdS Quantum Dots.materials,6(10),4523. |
| MLA | Tong, Haifang,et al."Room-Temperature Electron Spin Generation by Femtosecond Laser Pulses in Colloidal CdS Quantum Dots".materials 6.10(2013):4523. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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