%0 Journal Article
%T Performance of NbN lattice‐cooled hot‐electron bolometric mixers
%A Kawamura, J.
%A Blundell, R.
%A Tong, C. yu E.
%A Gol’tsman, G.
%A Gershenzon, E.
%A Voronov, B.
%J J. Appl. Phys.
%D 1996
%V 80
%N 7
%@ 0021-8979
%F Kawamura_etal1996
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=1607), last updated on Wed, 26 May 2021 11:07:20 -0500
%X The heterodyne performance of lattice‐cooled hot‐electron bolometric mixers is measured at 200 GHz. Superconducting thin‐film niobium nitride strips with ∼5 nm thickness are used as waveguide mixer elements. A double‐sideband receiver noise temperature of 750 K at 244 GHz is measured at an intermediate frequency centered at 1.5 GHz with 500 MHz bandwidth and with 4.2 K device temperature. The instantaneous bandwidth for this mixer is 1.6 GHz. The local oscillator power required by the mixer is about 0.5 μW. The mixer is linear to within 1 dB up to an input power level 6 dB below the local oscillator power. A receiver incorporating a hot‐electron bolometric mixer was used to detect molecular line emission in a laboratory gascell. This experiment unambiguously confirms that the receiver noise temperature determined from Y‐factor measurements reflects the true heterodyne sensitivity.
%K NbN HEB mixers
%R 10.1063/1.363304
%U http://aip.scitation.org/doi/10.1063/1.363304
%U https://doi.org/10.1063/1.363304
%P 4232-4234