Spiral antenna nbn hot-electron bolometer mixer at submm requencies
Artikel i vetenskaplig tidskrift, 1997

We have studied the phonon-cooled hot-electron bolometer (HEB) as a quasioptical mixer based on a spiral antenna designed for the 0.3-1 THz frequency band and fabricated on sapphire and high resistivity silicon substrates. HEB devices were produced from superconducting 3.5-5 nm thick NbN films with a critical temperature 10-12 K and a critical current density of approximately 10/sup 7/ A/cm/sup 2/ at 4.2 K. For these devices we reached a DSB receiver noise temperature below 1500 K, a total conversion loss of L/sub t/=16 dB in the 500-700 GHz frequency range, an IF bandwidth of 3-4 GHz and an optimal LO absorbed power of /spl sime/4 /spl mu/W. We experimentally analyzed various contributions to the conversion loss and obtained an RF coupling factor of about 5 dB, internal mixer loss of 10 dB and IF mismatch of 1 dB.

terahertz

hot-electron bolometer

NbN film

Författare

S. Svechnikov

Moscow State Pedagogical University

G. N. Gol'tsman

Moscow State Pedagogical University

Boris Voronov

Moscow State Pedagogical University

P. Yagoubov

Serguei Cherednichenko

Chalmers, Mikroteknologi och nanovetenskap (MC2), Terahertz- och millimetervågsteknik

E.M. Gershenzon

Moscow State Pedagogical University

Victor Belitsky

GARD teknik

Hans Ekström

Chalmers

Erik Kollberg

Chalmers, Mikroteknologi och nanovetenskap (MC2), Terahertz- och millimetervågsteknik

Alexei Semenov

Yu. Gousev

K. Renk

Universität Regensburg

IEEE Transactions on Applied Superconductivity

1051-8223 (ISSN)

Vol. 7 2 3395-3398

Ämneskategorier

Subatomär fysik

Fysikalisk kemi

Nanoteknik

Annan elektroteknik och elektronik

DOI

10.1109/77.622105

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Senast uppdaterat

2018-03-13