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InAsSb Infrared Detector

Photonics.com
Jul 2010
Hamamatsu CorporationRequest Info
 
BRIDGEWATER, N.J., July 7, 2010 — For high-sensitivity measurements in the 5-µm spectral band, Hamamatsu Photonics has introduced a commercially available indium arsenide antimonide (InAsSb) detector, the P11120-901. It provides peak sensitivity in the 5-µm infrared spectral band but operates over the entire range from 1.6 to 5.8 µm. This high sensitivity is realized via proprietary crystal growth technology.

The InAsSb photodiode used in the P11120-901 has a planar structure which ensures high-speed response and high reliability. Typical rise time is 200 ns.

The window material is Si with an antireflection coating, the package is metal Dewar, and cooling is via liquid nitrogen.

Typical photosensitivity is 0.8 A/W, shunt resistance is 1 × 105 Ω, reverse voltage is 0.1 V, and operating temperature is from -40 to 60 °C

Applications include gas analysis; with the detector covering a wide range of molecular absorption wavelengths, in particular for CO2, SOx, CO and NOx. It is also suited for applications in thermometry (radiometry), thermal imaging, remote sensing, and Fourier transform infrared and IR spectrophotometry.

The company can shift the peak sensitivity to longer wavelengths by altering the composition ratio of As and Sb in the detector, enabling tailor-made InAsSb solutions for specific applications.


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GLOSSARY
antireflection coating
A thin layer of material applied to a lens surface to reduce the amount of reflected energy. Ideally the index of refraction of that material should be equal to the square root of the product of the indices of the material on either side of the coating, while the ideal thickness for a single-layer coating is one-quarter of the wavelength at which reflectance is to be minimized. See also multilayer coating.
detector
1. A device designed to convert the energy of incident radiation into another form for the determination of the presence of the radiation. The device may function by electrical, photographic or visual means. 2. A device that provides an electric output that is a useful measure of the radiation that is incident on the device.
radiometry
The science of radiation measurement. The detection and measurement of radiant energy, either as separate wavelengths or integrated over a broad wavelength band, and the interaction of radiation with matter in such ways as absorption, reflectance and emission.
remote sensing
Technique that utilizes electromagnetic energy to detect and quantify information about an object that is not in contact with the sensing apparatus.
thermal imaging
The process of producing a visible two-dimensional image of a scene that is dependent on differences in thermal or infrared radiation from the scene reaching the aperture of the imaging device.
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