Single FIR-photon detection using a quantum dot

V. Antonov, O. Astafiev, T. Kutsuwa, H. Hirai, S. Komiyama

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


We study single-electron-transistor (SET) operation of the quantum dot (QD) in a strong magnetic field under weak illumination of far-infrared (FIR) radiation, which causes cyclotron resonance (CR) excitation inside the QD. We find that the SET conductance resonance is exceedingly sensitive to the FIR: It switches on (off) upon the excitation of just one electron to a higher Landau level inside the QD, whereby enabling us to detect individual events of FIR-photon (hv≅6 meV) absorption.

Original languageEnglish
Article number406
Pages (from-to)367-370
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number1
Publication statusPublished - 2000
Externally publishedYes


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