PT Journal
AU Trifonov, VA
   Karasik, BS
   Zorin, MA
   Gol’tsman, GN
   Gershenzon, EM
   Lindgren, M
   Danerud, M
   Winkler, D
TI 9.6 μm wavelength mixing in a patterned YBa[sub:2]Cu[sub:3]O[sub:7‐δ] thin film
SO Appl. Phys. Lett.
JI Appl. Phys. Lett.
PY 1996
BP 1418
EP 1420
VL 68
IS 10
DI 10.1063/1.116099
DE YBCO HTS HEB mixers
AB Hot‐electron bolometric (HEB) mixing of 9.6 μm infrared radiation from two lasers in high‐quality YBa2Cu3O7−δ (YBCO) patterned thin film has been demonstrated. A heterodyne measurement showed an intermediate frequency (IF) bandwidth of 18 GHz, limited by our measurement system. An intrinsic limit of 100 GHz is predicted. Between 0.1 and 1 GHz intermediate frequency, temperature fluctuations with an equivalent output noise temperature Tfl up to ∼150 K, contributed to the mixer noise while Johnson noise dominated above 1 GHz. The overall conversion loss at 77 K at low intermediate frequencies was measured to be ∼25 dB, of which 13 dB was due to the coupling loss. The HEB mixer is very promising for use in heterodyne receivers within the whole infrared range.
ER