TY  - JOUR
AU  - Hübers, H-W
AU  - Schubert, J.
AU  - Krabbe, A.
AU  - Birk, M.
AU  - Wagner, G.
AU  - Semenov, A.
AU  - Gol’tsman, G.
AU  - Voronov, B.
AU  - Gershenzon, E.
PY  - 2001
DA  - 2001//
TI  - Parylene anti-reflection coating of a quasi-optical hot-electron-bolometric mixer at terahertz frequencies
T2  - Infrared Physics & Technology
JO  - Infrared Physics & Technology
SP  - 41
EP  - 47
VL  - 42
IS  - 1
KW  - NbN HEB mixers
KW  - anti-reflection coating
AB  - Parylene C was investigated as anti-reflection coating for silicon at terahertz frequencies. Measurements with a Fourier-transform spectrometer show that the transmittance of pure silicon can be improved by about 30% when applying a layer of Parylene C with a quarter wavelength optical thickness. The 10% bandwidth of this coating extends from 1.5 to 3 THz for a center frequency of 2.3–2.5 THz, where the transmittance is constant. Heterodyne measurements demonstrate that the noise temperature of a hot-electron-bolometric mixer can be reduced significantly by coating the silicon lens of the hybrid antenna with a quarter wavelength Parylene C layer. Compared to the same mixer with an uncoated lens the improvement is about 30% at a frequency of 2.5 THz.
SN  - 1350-4495
UR  - https://linkinghub.elsevier.com/retrieve/pii/S1350449500000578
UR  - https://doi.org/10.1016/S1350-4495(00)00057-8
DO  - 10.1016/S1350-4495(00)00057-8
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=1548), last updated on Mon, 24 May 2021 14:16:35 -0500
ID  - Huebers_etal2001
ER  -