In one embodiment {HEAD ~ the light} is confined from {TAIL ~ both the internal and the external sides} of the device forming a guiding channel or just by the external side forming a disk resonator 
is confined from
In one embodiment { HEAD ~ the light } is confined from { TAIL ~ both the internal and the external sides } of the device forming a guiding channel or just by the external side forming a disk resonator
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH