Analysis of surface waves generated on subwavelength-structured silver films

Abstract

Using transmission electron microscopy (TEM) to analyse the physical-chemical surface properties of subwavlength structured silver films and finite-difference time-domain (FDTD) numerical simulations of the optical response of these structures to plane-wave excitation, we report on the origin and nature of the persistent surface waves generated by a single slit-groove motif and recently measured by far-field optical interferometry. The surface analysis shows that the silver films are free of detectable oxide or sulfide contaminants, and the numerical simulations show very good agreement with the results previously reported.

9 Figures

References in corpus (2)

• Theory of surface plasmon generation at nanoslit apertures
• Surface wave generation and propagation on metallic subwavelength structures measured by far-field interferometry

Cited by in corpus (5)

• A microscopic view of the electromagnetic properties of sub-wavelength metallic surfaces
• Transient behavior of surface plasmon polaritons scattered at a subwavelength groove
• Surface-wave interferometry on single subwavelength slit-groove structures fabricated on gold films
• Comment on ``Enhanced transmission of light through a gold film due to excitation of standing surface-plasmon Bloch waves"
• Actively tunable plasmonic lens for subwavelength imaging at different wavelengths