Del Mar Photonics, Inc.
4119 Twilight Ridge
San Diego, CA 92130
tel: (858) 876-3133
fax: (858) 630-2376
Skype: delmarphotonics
sales@dmphotonics.com
THz detectors: Golay cell and LiTaO3 piroelectric detectors
Pyroelectric detector
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Operating spectral range: 0.1 – 3.0 THz (with filter), 0.02 - 20 THz (without
filter)
Responsivity: 1000 V/W
Noise level: 1 mV
Golay Cell (with a polyethylene window) -
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Opto-acoustic THz detector mounted on a vibration-isolating base.
Operating spectral range: 0.02-20 THz
Responsivity: 5000 V/W
Noise Level: 1 mV
Golay Cell (with a diamond window) -
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Opto-acoustic THz detector mounted on a vibration-isolating base.
Operating spectral range: 20 GHz to visible light
Responsivity: 5000 V/W
Noise Level: 1 mV
Golay Cell Power supply -
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The power supply provides for –15V, +15V and 32 mA electrical outputs required
for Golay Cell
operation
A Golay Cell, or Golay Detector is a type of detector mainly used for
infrared and terahertz spectroscopy. It consists of a small metal cylinder which
is closed by a blackened metal plate at one end and by a flexible metalized
diaphragm at the other. The cylinder is filled with xenon and then sealed. When
IR or THz radiation is allowed to fall on the blackened metal plate, it heats
the gas which causes it to expand. The resulting increase in pressure deforms
the diaphragm separating the two chambers. Light from a lamp is made to fall on
the diaphragm which reflects the light to a photocell. Motion of the diaphragm
changes the output of the cell [1]. Its main advantage is that its useful
wavelength range is very wide. The response is mainly linear over the entire
working range. It also has a quite good response time of the order of 10ms.
References
1. Golay M J E 1947 Rev. Sci. Insfrum. 18 347
Teraherts products from Del Mar Photonics
Pacifica THz Time Domain Spectrometer
Generation of 10 µJ ultrashort terahertz pulses by optical rectification
using
Wedge TiSapphire Multipass Amplifier
Crystals for THz generation:
Gallium Phosphor GaP 110-cut crystals for THz applications
GaSe is used as infrared nonlinear crystal and for THz applications
GaSe crystal, Z-cut, 10x10x1 mm
ZnTe crystals for THz generation ZnTe
crystal, 10x10x0.5 mm, 110-cut
Photoconductive Antenna for terahertz waves
iPCA - interdigital Photoconductive Antenna for terahertz waves
THz detectors: Golay cell and LiTaO3 piroelectric detectors
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Del Mar Photonics, Inc.
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