SGER: Photon-Assisted Quantum Transport in Quantum Point Contacts

SGER：量子点接触中的光子辅助量子传输

• 批准号: 9109330
• 负责人: Qing Hu
• 金额: $ 5万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-06-15 至 1993-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9109330&HistoricalAwards=false
• 关键词: SGER; Photon; Assisted; Quantum; Transport

The conductance through a quantum point was discovered in 1988 to be a multiple of the quantum conductance 2e2/h. This quantum behavior may have an important impact on the development of future generation of electronic devices. The focus of this project is to study the interaction between far- infrared photons and electrons in quantum point contacts. It is expected that this conductance can be modulated by a small-amplitude far-infrared radiation. By absorbing photons, the electrons can raise their energies to above the level of a subband in the quantum point contact and contribute to conduction. This effect is similar to photon-assisted tunneling in superconducting tunnel junctions. The result of this research may substantially improve our understanding of the quantum transport phenomena, and the interaction between electrons and photons in the quantum transport processes. If the effect is verified experimentally, novel long-wavelength optoelectronic devices, such as optically controlled switches and modulators, photon detectors and heterodyne mixers, can be constructed.

通过量子点的电导为 在1988年发现是量子的倍数 电导率2e2/h。 这种量子行为可能 对未来发展的重要影响 电子设备的产生。 的重点 项目是研究远- 量子点中的红外光子和电子 联系人. 预计该电导率可以是 由小振幅远红外调制 辐射 通过吸收光子，电子可以 将它们的能量提高到高于子带的水平， 量子点接触并有助于 传导 这种效应类似于光子辅助 超导隧道结中的隧道效应 的 这项研究的结果可能会大大改善我们的 理解量子传输现象， 以及电子和光子之间的相互作用 量子传输过程。 如果效果 经过实验验证的新型长波长 光电子器件，例如光控的 开关和调制器，光子探测器， 外差混频器。