{HEAD ~ An arrangement} includes a photonic band gap assembly comprising at least one input wave guide and at least one output wave guides, and at least one routing element responsive to signals to selectively route {TAIL ~ a signal} from the input wave guide to one or more of the output wave guides 
{ HEAD ~ An arrangement } includes a photonic band gap assembly comprising at least one input wave guide and at least one output wave guides , and at least one routing element responsive to signals to selectively route { TAIL ~ a signal } from the input wave guide to one or more of the output wave guides
HEAD HEAD HEAD HEAD HEAD HEAD 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 OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH