CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Optical Response of a Cold-Electron Bolometer Array Integrated in a 345-GHz Cross-Slot Antenna

Mikhail Tarasov ; Leonid Kuzmin (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; Valerian Edel'man ; Sumedh Mahashabde (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; Paolo de Bernardis
IEEE transactions on applied superconductivity (1051-8223). Vol. 21 (2011), 6, p. 3635-3639.
[Artikel, refereegranskad vetenskaplig]

Two series/parallel arrays of ten cold-electron bolometers with superconductor–insulator–normal tunnel junctions were integrated in orthogonal ports of a cross-slot antenna. To increase the dynamic range of the receiver, all single bolometers in an array are connected in parallel for the microwave signal by capacitive coupling. To increase the output response, bolometers are connected in series for dc bias. With the measured voltage-to-temperature response of 8.8 μV/mK, absorber volume of 0.08 μm3, and output noise of about 10 nV/Hz1/2, we estimated the dark electrical noise equivalent power (NEP) as NEP = 6∗ 10−18 W/Hz1/2. The optical response down to NEP = 2∗ 10−17 W/Hz1/2 was measured using a hot/cold load as a radiation source and a sample temperature down to 100 mK. The fluctuation sensitivity to the radiation source temperature is 1.3 ∗ 10−4 K/Hz1/2. A dynamic range over 43 dB was measured using a backward-wave oscillator, a variable polarization grid attenuator, and cold filters/attenuators.

Nyckelord: Bolometer arrays, cold-electron bolometers (CEBs), cross-slot antennas, superconducting integrated circuits

Denna post skapades 2014-10-30. Senast ändrad 2016-06-28.
CPL Pubid: 205105


Läs direkt!

Lokal fulltext (fritt tillgänglig)

Länk till annan sajt (kan kräva inloggning)