Optical device could detect drugs, bomb-making chemicals
The image above depicts a new device for surface enhanced infrared absorption spectroscopy. Infrared light (the white beams) is trapped by tiny gaps in the metal surface, where it can be used to detect trace amounts of matter.
More about this image
When searching for traces of drugs, ...This is an NSF Multimedia Gallery item.
Source: NSF Multimedia Gallery - Category: Science Source Type: video