Waveguide(s) (130) including at least partially buried channels) (120) within substrate(s) (100) having at least one substantially planar surface (110) are disclosed. According to some embodiments at least part of the channel (120) is located beneath at least a portion of the substrate (100). According...http://www.google.com.au/patents/US7653281?utm_source=gb-gplus-sharePatent US7653281 - Embedded channels, embedded waveguides and methods of manufacturing and using the same
