▁of ▁the ▁U . S . ▁Department ▁of ▁Def ense . ▁The ▁main ▁focus ▁of ▁his ▁research ▁is ▁a ▁fundamental ▁understanding ▁of ▁the ▁structure ▁and ▁quantum - size ▁properties ▁of ▁n ano - material s ▁and ▁their ▁applications ▁in ▁Army ▁techn ologies . ▁ ▁Books ▁author ed ▁and ▁co - author ed ▁ ▁Non linear ▁Opt ical ▁Material s ▁ ▁Def ense ▁App lications ▁of ▁Nan om aterial s ▁ ▁Non linear ▁Opt ical ▁Material s : ▁Theory ▁and ▁Model ing ▁ ▁Organ ic ▁and ▁N ano compos ite ▁Opt ical ▁Material s : ▁ 2 0 0 4 ▁M RS ▁Fall ▁Me eting ▁Sym pos ium ▁Pro ceed ings , ▁Vol . ▁ 8 4 6 ▁ ▁Professional ▁members hips ▁and ▁affili ations ▁ ▁Fellow , ▁American ▁Phys ical ▁Society , ▁ 2 0 0 6 ▁ ▁Fellow , ▁United ▁States ▁Army ▁Research ▁Labor atory ▁ ▁Fellow , ▁The ▁Opt ical ▁Society , ▁ 2 0 0 4 ▁ ▁Senior ▁Member , ▁IE EE , ▁Elect ed ▁ 2 0 0 0 ▁ ▁Member , ▁American ▁Chem ical ▁Society ▁ ▁Member , ▁American ▁Association ▁for ▁the ▁Ad van cement ▁of ▁Science ▁ ▁Rec ent ▁publications ▁ ▁Kar rea ▁PS K , ▁Berg st rom ▁PL , ▁Mall ick ▁G , ▁et ▁al . ▁Room ▁temperature ▁oper ational ▁single ▁electron ▁trans istor ▁fabric ated ▁by ▁focused ▁ion ▁beam ▁de position ▁Journal ▁of ▁App lied ▁Physics ▁ 1 0 2 ▁( 2 ): ▁Art . ▁No . ▁ 0 2 4 3 1 6