Terahertz excitation, transport, and spectroscopy of an AFM-defined quantum dot

Naser Qureshi; S. James Allen Jr.; Itaru Kamiya; Yusui Nakamura; Hiroyuki Sakaki

doi:10.1117/12.347118

29 April 1999 Terahertz excitation, transport, and spectroscopy of an AFM-defined quantum dot

Naser Qureshi, S. James Allen Jr., Itaru Kamiya, Yusui Nakamura, Hiroyuki Sakaki

Proceedings Volume 3617, Terahertz Spectroscopy and Applications; (1999) https://doi.org/10.1117/12.347118
Event: Optoelectronics '99 - Integrated Optoelectronic Devices, 1999, San Jose, CA, United States

Abstract

We have investigated the terahertz photoresponse of a single semiconductor quantum dot, electrostatically defined by a sharp conducing Atomic Force Microscope tip in contact with a resonant tunneling diode structure. The quantum dot is excited by radiation from a Free Electron Laser in experiments both at room temperature and at cryogenic temperatures. Pronounced resonant tunneling features and classical rectification at frequencies from 0.3 to 3THz are observed in the I-V curves of these devices. These results demonstrate a novel approach to achieving terahertz excitation and studying transport in quantum dots.

Citation Download Citation

Naser Qureshi, S. James Allen Jr., Itaru Kamiya, Yusui Nakamura, and Hiroyuki Sakaki "Terahertz excitation, transport, and spectroscopy of an AFM-defined quantum dot", Proc. SPIE 3617, Terahertz Spectroscopy and Applications, (29 April 1999); https://doi.org/10.1117/12.347118

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