Sensitive Terahertz Detectors: Cooled Terahertz Detectors based on Hot Electron Bolometer (HEB)

Cooled Terahertz Detectors: Hot Electron Bolometers (HEB)

Cooled Terahertz (THz) Detector Type 7: Hot Electron Bolometer (HEB) Detector

Type of detector

7

Operating frequency range

25-150 THz

Noise Equivalent Power NEP

4-5*10^-12 W*HZ^-0.5

Response Time

50 ps

Maximum power handling capacity

1 mW

Upper level of the dynamic range (3dB compression point)

10 uW

Bandwidth of cold (LHe temp.) HEMT amplifier

1 MHz - 3.5 GHz

Total gain (including room temperature amplifying)

55-60 dB

Cold filter and window of the LHe cryostat

High Resistivity Germanium window

Antenna type

12 mm Dia Germanium hyperhemi-spherical lens

Superconducting material of the sensitive element

NbN

 

Liquid helium Cryostat characteristics 

Type of cryostat
1
2
3
Volume of liquid helium
0.5 liters
0.8 liters
2.0 liters
liquid helium hold time
more than 5 hours
more than 5 hours
more than 5 hours
Input optical window diameter
12 mm
20 mm
40 mm
Weight
5 kg
6.5 kg
18 kg
Height
360 mm
380 mm
490 mm
Diameter

150 mm

160 mm

260 mm

Temperature on the cold plate
4.2 K
4.2 K
4.2 K
Output signal connector type
SMA-50 Ohm
SMA-50 Ohm
SMA-50 Ohm

 

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