VIGO Photonics S.A. has developed a unique technology for manufacturing instruments for quick and convenient detection of 1 – 16µm infrared radiation. The instruments operate in ambient temperature or are cooled with simple and inexpensive thermoelectric coolers.

The detectors are built with the use of mercury cadmium telluride (HgCdTe), a unique material whose band gap may be tuned to a large extent by means of changing the alloy composition. The fact that in this material the lattice parameter remains unchanged when the alloy composition is modified, enables band gap engineering and fabrication of semiconductor heterostructures having virtually any spatial structure.

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By 2003, VIGO had been manufacturing detectors with the use of Isothermal Vapour Phase Epitaxy (ISOVPE) of HgCdTe. It did not require costly devices, but on the other hand it did not enable fabrication of complicated semiconductor structures, like ones in which the band gap could be increased or decreased in consecutive layers of a heterostructure. The possibility of free spatial shaping of the band gap and of doping level adjustment was ensured by a MetalOrganic Chemical Vapour Deposition (MOCVD) reactor commissioned in 2003.

Technique used for manufacturing IR detectors by VIGO Photonics is heteroepitaxy of mercury cadmium telluride on a two-inch gallium arsenide (GaA) substrate with the use of the MOCVD method. As a result, multi-layer semi-conductor heterostructures are obtained consisting of more than twenty layers as a maximum, varying in terms of thickness, composition, doping and band gap broadening. They fulfill various functions: structural, optical, photoelectric and electronic.

As the technique is being continuously improved, better instruments can be built showing greater limit of detection and operating speed, as well as being more reliable and convenient to use, with their manufacturing is less expensive. The flexibility of manufacturing processes and the high capacity of the reactor enable fabrication of tailor-made sensors adjusted to the specific needs of the user, particularly to each radiation band within the range from 1 to 16μm, and to various operating temperatures (200 – 300K).

VIGO Photonics designs and manufactures electronic subassemblies (preamplifiers, thermoelectric cooler controllers, power supply units) for HgCdTe, detectors, as well as mechanical accessories.

Epi-wafers

VIGO manufacture exceptionally high quality III-V epitaxial structures for use in sophisticated electronics such as lasers, photodetectors, transistors, photovoltaic cells and other devices. As one of the few companies on the market, we offer a broad range of high quality epi-wafers, which can be produced both in large volumes as well as in small test batches. Further information here

 

 

Infrared Detectors

Detectors based on HgCdTe material that offer the highest performance out of all discovered materials suitable for Infrared detection. Our detectors are optimized for MWIR (3-8μm) and LWIR (8-16μm) spectral ranges. It is perfect for creating gas sensors for industry and environmental protection. They are an ideal solution for CRDS, TDLAS or FTIR spectroscopy. Very high parameters of detection and speed of operation make them ideal for applications such as leak detection, transport safety or defense applications. We also offer InAs or InAsSb based detectors that are RoHS compliant and suitable for the consumer market. Further information here
 

Infrared Detection Modules

VIGO's modules (infrared detectors integrated with electronics) are characterized by high sensitivity in a wide spectral range from 1 to 16 μm, high speed in frequency bands up to 1 GHz, optimized amplification of the measured signal and operating temperatures in the range from 200 to 300 K. Our offer there are ready-made modules for applications such as gas analysis, temperature control in fast-moving objects, laser spectroscopy. We also have the option of configuring the infrared module to the needs of a specific application. Further information here
 

Product Development

VIGO have extensive research and development facilities and constantly strive to develop new, unique technologies and products. We are constantly expanding the portfolio of our infrared detectors and modules. We also offer the possibility of testing devices that are in the prototype stage. Find out more about the products our engineers and scientists are currently working on. Further information here