Isolated quantum dot in application to terahertz photon counting

H. Hashiba, V. Antonov, L. Kulik, A. Tzalenchuk, P. Kleinschmid, S. Giblin, S. Komiyama

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43 Citations (Scopus)

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.

Original languageEnglish
Article number081310
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume73
Issue number8
DOIs
Publication statusPublished - 2006
Externally publishedYes

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