The photonic routing system 19 wherein the first of the photonic configurations has a first three dimensional band gap and the second of the photonic configurations has {HEAD ~ a second three dimensional band gap} different from {TAIL ~ the first three dimensional band gap} 
different from
The photonic routing system 19 wherein the first of the photonic configurations has a first three dimensional band gap and the second of the photonic configurations has { HEAD ~ a second three dimensional band gap } different from { TAIL ~ the first three dimensional band gap }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL