Researchers at Stanford University have developed a prism-like device in silicon that can split a beam of light into different colors and bend the light at right angles. The development is seen as having possible applications in fiber optic networks. The device measures 8 microns in length and has been tested with both 1300-nanometer light and 1550-nanometer wavelengths.
http://news.stanford.edu/news/2014/december/optical-silicon-algorithm-120214.html
