Isolated quantum dot in application to terahertz photon counting
- 21 February 2006
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 73 (8), 081310
- https://doi.org/10.1103/physrevb.73.081310
Abstract
We present an experimental study of a large quantum dot (QD) capacitively coupled to an aluminum single electron transistor (SET) and irradiated with terahertz radiation from a blackbody source. The SET is used as a noninvasive electrometer sensitive to a single-charge fluctuation on the QD. Qualitatively different regimes of QD confinement have been identified from the SET response. We demonstrate that the state of a nearly isolated QD can potentially be used for counting individual terahertz photons.Keywords
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