Hamamatsu mass produces InAs-GaSb mid-IR detector

Share this on social media:

Hamamatsu Photonics has mass-produced a mid-infrared detector that doesn’t use hazardous substances restricted under the European Commission’s RoHS directive.

The compound opto-semiconductor is made up of 2,000 thin-film layers of InAs and GaSb, alternately laminated onto a substrate.

The detector is able to sense mid-infrared light at a wavelength of 14.3μm without using mercury and cadmium, common materials used for mid-infrared detectors but which are now restricted substances under the RoHS directive.

Hamamatsu said its new product will be ideal for analytical instruments such as FT-IR spectrophotometers, which rely on mid-infrared light to identify substances contained in the air, foods, and drugs. The new product can also replace existing mid-infrared detectors commonly used in gas component analysers and infrared thermometers.

Opto-semiconductors made of silicon are widely used for detecting visible light. Compound opto-semiconductors composed of two or more semiconductor materials are used to detect mid-infrared light with wavelengths longer than the visible light range. However, these compound opto-semiconductor structures are difficult to mass-produce.

Hamamatsu claims it is the first company to mass produce this type-II superlattice infrared detector. Its manufacturing technology is able to alternately laminate InAs and GaSb thin films with uniform thickness and high repeatability.

Related news

Recent News

03 September 2020

Terahertz imaging company, Tihive, has been awarded €8.6m from the European Innovation Council's Accelerator programme to scale up its industrial inspection technology

19 May 2020

The National Institute of Standards and Technology and ASTM Committee E57 have released proceedings on a workshop to define the performance of 3D imaging systems for robots in manufacturing

12 May 2020

The sensors boast a pixel pitch of 5μm thanks to Sony's stacking technology using a copper-to-copper connection. They also deliver high quantum efficiency even in the visible range

06 April 2020

Zensors' algorithms analyse feeds from CCTV cameras to provide real-time data on the number of people in an area and whether safe distances are maintained between them