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

Cooled Terahertz Detectors: Hot Electron Bolometers (HEB)

Cooled Terahertz (THz) Detector Type 5: Hot Electron Bolometer (HEB) Detector

Type of detector

5

Operating frequency range

1-30 THz

Noise Equivalent Power NEP

<6 -8 * 10^-11 W *Hz^-0.5 (1-13 THz, 18-30 THz)
<1-2 * 10^-10 W*Hz^-0.5 (13 - 18 THz)

Response Time

50 ps

Maximum power handling capacity

 

10 mW

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

 

50 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

Black PEfiltering and HDPE window

Antenna type

4 mm Dia Silicon 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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