A quantum dot as a sensitive terahertz detector

H. Hashiba, B. Das, J. T. Nicholls, V. Antonov, L. Kulik, S. Komiyama

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The formation of 1 μm-diameter quantum dot (QD), defined by mesa patterning and metal gates in a GaAs/AlGaAs heterostructure, is studied using a capacitively coupled aluminium single-electron transistor (SET). The SET senses the charge of the QD at different gate potentials and can identify stable and metastable states of the QD. An electrostatic model gives a good description of the stable states, leaving, however, some unanswered questions concerning the metastable states. The application of the device for the sensitive detection of terahertz radiation is discussed.

Original languageEnglish
Pages (from-to)644-646
Number of pages3
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume34
Issue number1-2
DOIs
Publication statusPublished - Aug 2006
Externally publishedYes

Keywords

  • Coulomb blockade
  • Quantum dot
  • Terahertz

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