THz superconducting detectors and THz metasurfaces

Superconducting cavities Thz

metamaterials

HEB

SHAB

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.

Contact:

Sara Cibella

Pasquale Carelli

Maria Gabriella Castellano

Fabio Chiarello

Alessandro Gaggero

Ennio Giovine

Guido Torrioli

Roberto Leoni