We present a new technique to engineer metallic interfaces to produce sharp tips with
smooth curved surfaces and variable tip angles, as well as ridges with arbitrary contour …

We describe and demonstrate the use of an adaptive wave front optimization scheme for
enhancing the efficiency of adiabatic nanofocusing of surface plasmon polariton (SPP) …

We studied adiabatic nanofocusing of strongly localized surface plasmons in tapered metal
rods with parabolic perturbations of the conical shape of the taper. Typical plasmon …

Scattering-type scanning near-field optical microscopy based on adiabatic nanofocusing of
surface plasmon polaritons (SPPs) is a powerful technique that can achieve free …

We demonstrate multiphoton photoelectron emission from gold nanotips induced by
nanofocusing surface plasmons, resonantly excited on the tip shaft by a grating coupler. The …

This Letter considers an 'ultimate'nanofocusing system with arguably the largest field
enhancements achievable in plasmonic nanofocusing structures. These enhancements …

Focusing light to subwavelength dimensions has been a long-standing desire in optics but
has remained challenging, even with new strategies based on near-field effects, polaritons …

We demonstrate a novel scheme for plasmonic nanofocusing with internally illuminated
asymmetric metallic pyramidal tips using linearly polarized light. A wafer-scale array of sharp …

Sharp metallic tips and wedges are capable of squeezing and manipulating optical energy
beyond the diffraction limit by harnessing surface plasmon polaritons—collective charge …

We demonstrate precise three-dimensional integration of smooth bumps, grooves, and
apertures in optically thick metal films using template stripping. Patterned silicon wafers are …