Showing papers by "Joel I. Gersten published in 1984"
TL;DR: In this article, the authors generalized the Forster-Dexter theory of energy transfer between molecules to include the effects of a nearby solid state particle and found that the energy transfer rate between a donor and acceptor molecule may be enhanced by many orders of magnitude when the molecular transition frequencies lie in the vicinity of the resonance frequency of the particle and when the particle possesses sharp features.
139 citations
TL;DR: This paper showed that surface-enhanced Raman scattering from molecules adsorbed on coldly evaporated silver films is interpreted as an electromagnetic field enhancement in regions enclosed by several silver grains.
131 citations
TL;DR: In this paper, the photochemical and photophysical properties of an adsorbate on discontinuous metal-island films are used to explore the unusual electrodynamics near rough metal surfaces.
Abstract: Detailed measurements of the photochemical and photophysical properties of an adsorbate on discontinuous metal‐island films are used to explore the unusual electrodynamics near rough metal surfaces. Several aspects of the properties have been measured: the magnitude the temporal decay of the fluorescence, the shape and temporal evolution of the fluorescence spectrum, and the effects on the spectrum of a photochemical hole‐burning process. Dramatic increases in the fluorescent decay rate and decreases in the photochemical reaction rate as well as systematic spectral shifts of the emission of molecules experiencing the different electrodynamic environments on the island film are observed. These results reveal the strong effects of the coupling between the adsorbate and the plasma resonances localized on the islands of the film. We model our results using the electrodynamic picture which has successfully described many aspects of surface‐enhanced Raman scattering and other optical processes on island films. ...
33 citations
TL;DR: In this article, angle-resolved electron-energy-loss spectroscopy from solid-state surfaces is studied both theoretically and experimentally, with particular emphasis on the ZnO surface.
Abstract: Angle-resolved electron-energy-loss spectroscopy from solid-state surfaces is studied both theoretically and experimentally, with particular emphasis on the ZnO surface. The plasmonlike loss peak is found to shift as a function of detector angle. This is due to the highly dispersive nature of the plasmon mode. There is also evidence for a phononlike model which remains unshifted as a function of detector angle. The role of both collective and single-particle excitations are considered, and the theory is found to be in good agreement with the experiment.
18 citations
9 citations
TL;DR: Interference fringes are observed produced by Mie scattering of laser light from a single microstructure or from a random array of microstructures supported above a reflecting surface which are the basis of a simple interferometer which can be used to measure distances from thousands of angstroms to centimeters.
Abstract: Interference fringes are observed produced by Mie scattering of laser light from a single microstructure or from a random array of microstructures supported above a reflecting surface. These fringes are the basis of a simple interferometer which can be used to measure distances from thousands of angstroms to centimeters. The interferometer is used to measure the height of liquid above a mercury surface. Raman scattering (RS) from the liquid is measured, and an upper limit of 10(3) is placed on the enhancement of RS from molecules at the interface. Enhancement of RS in a wedge between mercury and solid is examined theoretically.
1 citations