27 Apr '16, 8pm

Nanostructures Give Infrared Photodetectors Three Colors to See In

Nanostructures Give Infrared Photodetectors Three Colors to See In

The nanostructured materials known as Type-II indium arsenide/gallium antimonide/aluminum antimonide (InAs/GaSb/AlSb) superlattices have been around since the 1970s and have served in infrared detection applications since the late 1980s. Since then, Type-II Sb-based superlattice materials have evolved drastically with many variants suited for different applications. Now researchers at Northwestern University, led by Manijeh Razeghi, have developed a new superlattice design, called M-structure superlattice . It can be used to make devices that operate as a shortwave/mid-wave/long-wave infrared photodetector. Shortwave infrared wave (SWIR) bands make it possible to detect reflected light. Mid-wave detection picks up hot plumes and long-wave infrared detects cooler objects. The researchers claim that a device designed around this new material can detect any of these infrared ...

Full article: http://spectrum.ieee.org/nanoclast/semiconductors/materia...

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