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Proceedings Paper

Terahertz excitation, transport, and spectroscopy of an AFM-defined quantum dot
Author(s): Naser Qureshi; S. James Allen; Itaru Kamiya; Yusui Nakamura; Hiroyuki Sakaki
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Paper 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.

Paper Details

Date Published: 29 April 1999
PDF: 4 pages
Proc. SPIE 3617, Terahertz Spectroscopy and Applications, (29 April 1999); doi: 10.1117/12.347118
Show Author Affiliations
Naser Qureshi, Univ. of California/Santa Barbara (United States)
S. James Allen, Univ. of California/Santa Barbara (United States)
Itaru Kamiya, Japan Science and Technology Corp. (Japan)
Yusui Nakamura, Japan Science and Technology Corp. (Japan)
Hiroyuki Sakaki, Japan Science and Technology Corp. (Japan)

Published in SPIE Proceedings Vol. 3617:
Terahertz Spectroscopy and Applications
Mark S. Sherwin, Editor(s)

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