Full characterisation of a background limited antenna coupled KID over an octave of bandwidth for THz radiation
J. Bueno Lopez (SRON–Netherlands Institute for Space Research)
O. Yurduseven (TU Delft - Tera-Hertz Sensing)
S. Yates (SRON–Netherlands Institute for Space Research)
N. Llombart (TU Delft - Tera-Hertz Sensing)
V. Murugesan (SRON–Netherlands Institute for Space Research)
David Thoen (TU Delft - Tera-Hertz Sensing)
AM Baryshev (SRON–Netherlands Institute for Space Research, Rijksuniversiteit Groningen)
A. Neto (TU Delft - Tera-Hertz Sensing)
J. Baselmans (SRON–Netherlands Institute for Space Research, TU Delft - Tera-Hertz Sensing)
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Abstract
We present the design, fabrication, and full characterisation (sensitivity, beam pattern, and frequency response) of a background limited broadband antenna coupled kinetic inductance detector covering the frequency range from 1.4 to 2.8 THz. This device shows photon noise limited performance with a noise equivalent power of 2.5 × 10-19W/Hz1/2 at 1.55 THz and can be easily scaled to a kilo-pixel array. The measured optical efficiency, beam pattern, and antenna frequency response match very well the simulations.