Nanotechnology

The science and technology of precisely manipulating the structure of matter at the atomic and molecular level (one nanometre is one billionth of a metre). In the authentication arena, nanotechnology is being used to explore and develop unique optical phenomena for...

Near-infrared

The part of the electromagnetic spectrum between 780nm and 2500nm, near-infrared is the region closest in wavelength to the red light detectable by the human eye.