Additionally, {HEAD ~ three dimensional photonic crystal waveguides} of {TAIL ~ an inverted opal structure} having a photonic band gap in all light traveling directions can be fabricated 
Additionally , { HEAD ~ three dimensional photonic crystal waveguides } of { TAIL ~ an inverted opal structure } having a photonic band gap in all light traveling directions can be fabricated
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH