title: Giant and uniform fluorescence enhancement over large areas using plasmonic nanodots in 3D resonant cavity nanoantenna by nanoimprinting.
abstract: Using a new nanoplasmonic architecture and an optimized spacer, we observed the following: (a) the average fluorescence of an infrared dye (indocyanine green) is enhanced by 2970 fold uniformly (variation < 11%) over a large sample area and over a wide range of dye concentrations (380 to 380,000 molecule µm(-2)), laser excitation powers and laser beam sizes; and (b) for a single molecule placed at a 'hot spot', the fluorescence enhancement is 4.5 × 10(6) fold. The giant and uniform enhancements (orders of magnitude higher than before), plus easy and inexpensive large area fabrication ( > 4″ wafers), should open up wide applications.
authors.affiliation: NanoStructure Laboratory, Department of Electrical Engineering, Princeton University, Princeton, NJ 08544, USA.
authors.forename: Weihua
authors.initials: W
authors.lastname: Zhang
authors.forename: Fei
authors.initials: F
authors.lastname: Ding
authors.forename: Wen-Di
authors.initials: WD
authors.lastname: Li
authors.forename: Yuxuan
authors.initials: Y
authors.lastname: Wang
authors.forename: Jonathan
authors.initials: J
authors.lastname: Hu
authors.forename: Stephen Y
authors.initials: SY
authors.lastname: Chou