{HEAD ~ The non control rods} of {TAIL ~ the two dimensional photonic crystal} may also be non ferromagnetic metal rods or dielectric non metal rods 
{ HEAD ~ The non control rods } of { TAIL ~ the two dimensional photonic crystal } may also be non ferromagnetic metal rods or dielectric non metal rods
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH