title: Surface enhanced infrared spectroscopy with gold strip gratings.
abstract: We investigate surface enhanced infrared absorption (SEIRA) spectroscopy with gold strip gratings made by standard optical lithography. By exciting surface plasmon polaritons on both air-gold and gold-substrate interfaces, the resonance of the 1D gratings is linearly tunable with the grating period. With the field enhancement at the edge of the gold strips, a SEIRA enhancement factor more than 6000 for PMMA molecules is achieved. The strong SEIRA enhancement together with the easy fabrication makes the gold strip grating a promising candidate for SEIRA experiments.
authors.affiliation: 1st Institute of Physics (1A), RWTH Aachen University, 52056 Aachen, Germany.
authors.forename: Tao
authors.initials: T
authors.lastname: Wang
authors.forename: Vu Hoa
authors.initials: VH
authors.lastname: Nguyen
authors.forename: Andreas
authors.initials: A
authors.lastname: Buchenauer
authors.forename: Uwe
authors.initials: U
authors.lastname: Schnakenberg
authors.forename: Thomas
authors.initials: T
authors.lastname: Taubner
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D006046:Gold / Q000737:chemistry*; D012031:Refractometry / Q000295:instrumentation*; D013055:Spectrophotometry, Infrared / Q000295:instrumentation*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*
chemical_list: D006046:Gold