Wide tunability and electron transfer in GaAs/AlGaAs quantum well photodetector by magnetic field
文献类型：期刊论文
| 作者 | Yu CH; Zhang B; Luo XD; Lu W; Shen XC |
| 刊名 | APPLIED PHYSICS LETTERS
 |
| 出版日期 | 2017 |
| 卷号 | 110期号:19 |
| 关键词 | STATES SEMICONDUCTORS SILICON DONORS LASER SUPERLATTICES SPECTROSCOPY IMPURITIES TRANSITION GAAS |
| DOI | 10.1063/1.4983218 |
| 英文摘要 | One strategy for terahertz (THz) detection in GaAs/AlGaAs quantum well photodetectors under the magnetic field is reported. The THz detection begins to operate after the normally empty hydrogenic donor ground states in the AlGaAs barriers become populated by electrons transferred from the GaAs wells. Through the Landau quantization arising from a perpendicular magnetic field we achieved the electron transfer from subband Landau levels in the GaAs wells at liquid helium temperature when the magnetic field reaches a certain threshold. One detector based on this strategy exhibited a dramatic range of frequency tunability of 3.20-6.13 THz. Our photothermal ionization spectroscopy measurements show quantitative agreement with the theoretical calculation of intradonor transition energies verifying the origin of the strongly enhanced frequency tunability from the Zeeman behavior of transferred electrons in the AlGaAs barriers. This finding is useful for exploring magneto-optical effects and realization of wide tunability in THz photodetectors. Published by AIP Publishing. |
| 源URL | [http://202.127.2.71:8080/handle/181331/12273]  |
| 专题 | 上海技术物理研究所_上海技物所 |
| 作者单位 | Shanghai Inst Tech Phys |
| 推荐引用方式 GB/T 7714 | Yu CH,Zhang B,Luo XD,et al. Wide tunability and electron transfer in GaAs/AlGaAs quantum well photodetector by magnetic field[J]. APPLIED PHYSICS LETTERS,2017,110(19). |
| APA | Yu CH,Zhang B,Luo XD,Lu W,&Shen XC.(2017).Wide tunability and electron transfer in GaAs/AlGaAs quantum well photodetector by magnetic field.APPLIED PHYSICS LETTERS,110(19). |
| MLA | Yu CH,et al."Wide tunability and electron transfer in GaAs/AlGaAs quantum well photodetector by magnetic field".APPLIED PHYSICS LETTERS 110.19(2017). |
入库方式： OAI收割
来源：上海技术物理研究所
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