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THz superconducting detectors and THz metasurfaces

 SHAB

HEB


Superconducting cavities Thz
metamaterials





Contact:

Sara Cibella
Pasquale Carelli
Maria Gabriella Castellano
Fabio Chiarello
Alessandro Gaggero
Ennio Giovine
Guido Torrioli
Roberto Leoni




SHAB

Superconducting air bridge bolometer(1,2) made by 100 nm
Nb with an on-chip lithographic antenna :

•450 ns rise time constant (BW 1 MHz)

•NEP 20 fW/ Hz

•Estimated optical bandwidth of the Log-spiral antenna BW ≈ 0.4 -2.0 THz




HEB



Hot Electron Bolometer made by 5 nm NbN with an on-chip
lithographic antenna

•50ps rise time (BW 50GHZ)

•NEP 3x10-13 W/ Hz corresponding to TN 3000K

•Optical BW: 0.4-30 THz



Superconducting cavities Thz
metamaterials

Collaboration with G. Scalari et al., Quantum
Optoelectronics Group , ETH Zürich


Superconducting cavities (3-5)

•Increasing Q factor by lowering ohmic losses

•Changing the resonator characteristic trough the
superconducting transition.