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HL: Fachverband Halbleiterphysik

HL 5: Symposium Nanostructured Photonic Materials

HL 5.4: Hauptvortrag

Montag, 25. Februar 2008, 16:45–17:15, ER 270

Nanoplasmonics for field enhancement and subwavelength guiding — •Sergey I. Bozhevolnyi — Department of Physics and Nanotechnology, Aalborg University, Skjernvej 4A, Aalborg, Denmark

The explosive progress in nanoscience has led to uncovering and exploring numerous physical phenomena occurring at nanoscale. One of the main research directions in nano-optics is the search for configurations that efficiently interconvert propagating and strongly localized (nm-sized) optical fields resulting in strongly enhanced local fields indispensable for optical characterization, sensing and manipulation at nanoscale. After briefly reviewing various configurations used for creating enhanced optical fields, a novel route exploiting retardation-based resonances involving (slow) surface plasmon polaritons (SPPs) supported by metal nanostructures is considered in detail.

Photonic components are superior to electronic ones in terms of operational bandwidth but suffer from the diffraction limit that constitutes a major problem on the way towards miniaturization and high density integration of optical circuits. The main approach to circumvent this problem is to take advantage of hybrid nature of SPPs whose subwavelength confinement is achieved due to very short (nm-long) penetration of light in metals. After briefly reviewing various SPP guiding configuration, the results of our investigations of subwavelength photonic components utilizing SPP modes propagating along channels cut into gold films are overviewed demonstrating first examples of ultracompact plasmonic components.