London UK (SPX) Feb 06, 2008 – A new generation of sensors for detecting explosives and poisons could be developed following new research into a type of radiation known as T-rays, published in Nature Photonics. The research shows that these T-rays, electromagnetic waves in the far infrared part of the electromagnetic spectrum that have a wavelength 500 times longer than visible light, can be guided along the surface of a specially designed material, known as a metamaterial.