Point contact readout for a quantum dot terahertz sensor

S. Pelling, R. Davis, L. Kulik, A. Tzalenchuk, S. Kubatkin, T. Ueda, S. Komiyama, V. N. Antonov

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


We introduce a terahertz radiation sensor in which the photon-induced ionization state of a quantum dot is monitored by a point contact formed in the same semiconductor heterostructure. For comparison we used a readout based on a single electron transistor coupled to the same quantum dot. The experiments prove functionality of the point contact-based device with additional practical advantage of a higher operation temperature up to 1.5 K and ease of nanofabrication.

Original languageEnglish
Article number073501
JournalApplied Physics Letters
Issue number7
Publication statusPublished - 2008
Externally publishedYes


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