title: High-sensitivity stark spectroscopy obtained by surface plasmon resonance measurement.
abstract: The effect (Stark effect) of an applied electric field on the electronic states of molecular adsorbates was studied by measuring surface plasmon resonance (SPR) as a function of the wavelength of the incident light that excites the SPR. Using the Kramers-Kronig relation, Stark spectra comparable to those obtained with conventional methods were extracted from the electric field-induced SPR angular shift for several organic adsorbates. Because this method relies on detecting the SPR angular shift that can be measured precisely, high-sensitivity Stark spectroscopy can be achieved. In addition, the adsorbate coverage information can be determined from the SPR angular shift upon molecular adsorption.
authors.affiliation: Department of Physics, Florida International University, Miami 33199, USA.
authors.forename: S
authors.initials: S
authors.lastname: Wang
authors.forename: S
authors.initials: S
authors.lastname: Boussaad
authors.forename: S
authors.initials: S
authors.lastname: Wong
authors.forename: N J
authors.initials: NJ
authors.lastname: Tao
mesh_terms: D004560:Electricity; D012680:Sensitivity and Specificity; D013057:Spectrum Analysis; D020349:Surface Plasmon Resonance / Q000295:instrumentation / Q000379:methods