title: Plasmonic enhancement of nanophosphor upconversion luminescence in Au nanohole arrays.
abstract: Arrays of subwavelength holes (nanoholes) in Au films were computationally designed, fabricated, and used as templates to localize and enhance the luminescence of upconversion nanophosphors (UCNPs)--hexagonal phase NaYF4 doped with Yb(3+) and Er(3+). The dimensions of nanohole Au arrays were designed to accept only a single UCNP upon particle filling and with a periodicity to be resonant with the excitation wavelength of the upconversion. Frequency-dependent luminescence enhancements of up to 35-fold and a concomitant shortening of the UCNP luminescence rise time were observed, consistent with simulations of plasmonic enhancement of the UCNP absorption.
authors.affiliation: Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States.
authors.forename: Marjan
authors.initials: M
authors.lastname: Saboktakin
authors.forename: Xingchen
authors.initials: X
authors.lastname: Ye
authors.forename: Uday K
authors.initials: UK
authors.lastname: Chettiar
authors.forename: Nader
authors.initials: N
authors.lastname: Engheta
authors.forename: Christopher B
authors.initials: CB
authors.lastname: Murray
authors.forename: Cherie R
authors.initials: CR
authors.lastname: Kagan
mesh_terms: D000042:Absorption; D015374:Biosensing Techniques; D003102:Colloids / Q000737:chemistry; D003198:Computer Simulation; D020342:Finite Element Analysis; D049449:Luminescence; D008163:Luminescent Measurements; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods*; D055095:Optics and Photonics; D012834:Silver / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D003102:Colloids; D012834:Silver