title: Coupling of spontaneous emission from GaN-AlN quantum dots into silver surface plasmons.
abstract: We have demonstrated the decay of spontaneous emission (SE) from AlN-GaN quantum dots (QDs) into silver surface plasmon (SP) modes in the ultraviolet at approximately 375-380 nm. Using time-resolved photoluminescence (PL), we show that the electron-hole recombination rate in AlN-GaN QDs is enhanced when SE is resonantly coupled to a metal SP mode, corresponding to the dip in the continuous-wave PL spectrum. Exciton recombination by means of silver SP modes is as much as 3-7 times faster than in normal QD SE and depends strongly on emission wavelength and thickness of the silver.
authors.affiliation: Department of Physics, University of North Texas, Denton, Texas 76203, USA. arup@unt.edu
authors.forename: Arup
authors.initials: A
authors.lastname: Neogi
authors.forename: Hadis
authors.initials: H
authors.lastname: Morkoç
authors.forename: Takamasa
authors.initials: T
authors.lastname: Kuroda
authors.forename: Atsushi
authors.initials: A
authors.lastname: Tackeuchi