In some embodiments, the electromagnetic radiation can be rastered across {HEAD ~ one or more portions} of {TAIL ~ surface} 501 
In some embodiments , the electromagnetic radiation can be rastered across { HEAD ~ one or more portions } of { TAIL ~ surface } 501
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH