Double quantum dots as a high sensitive submillimeter-wave detector | Zendy

O. Astafiev | Zendy; Susumu Komiyama | Zendy; T. Kutsuwa | Zendy

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Double quantum dots as a high sensitive submillimeter-wave detector

Author(s) -

O. Astafiev,

Susumu Komiyama,

T. Kutsuwa

Publication year - 2001

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.1396628

Subject(s) - submillimeter wave , detector , physics , optoelectronics , optics , quantum , quantum dot , quantum mechanics , millimeter

A single electron transistor (SET) consisting of parallel double quantum dotsfabricated in a GaAs/Al$_{x}$Ga$_{1-x}$As heterostructure crystal isdemonstrated to serve as an extremely high sensitive detector of submillimeterwaves (SMMW). One of the double dots is ionized by SMMW via Kohn-mode plasmaexcitation, which affects the SET conductance through the other quantum dotyielding the photoresponse. Noise equivalent power of the detector forwavelengths about 0.6 mm is estimated to reach the order of $10^{-17}$W/$\sqrt{Hz}$ at 70 mK.Comment: 3 pages, 4 figures, REVTeX, submitted to Appl.Phys.Let

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