Fundamental Process of Near-Field Interaction

Authored by: Hirokazu Hori , Tetsuya Inoue

1 Handbook of Nanophysics

Print publication date:  September  2010
Online publication date:  September  2010

Print ISBN: 9781420075403
eBook ISBN: 9781420075410
Adobe ISBN:


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One of the most important issues of nanophysics is near-field electromagnetic interaction between nanometer-sized electronic systems, which generates correlation between electronic systems and governs excitation transfer and the resulting functions of nanodevices and nanosystems (Hori 2001). As the nature of strongly coupled fields plus matter system, near-field interactions generate complicated space-time correlation depending on the shape, size, and layout of material systems and bring us with a wide variety of novel functions useful for the exploration of nanoscience and nanotechnology. The strong space-time correlation also reveals basic problems involved in electromagnetic interactions in nanometer scales, such as difficulties in defining electromagnetic properties of matter in mean-field regime, in implementing unidirectional signal transport processes, and in considering electromagnetic causality related to near-field interactions. The key study to investigate these problems lies in the fields of near-field optics and nanophotonics, because relatively large optical wavelengths enable us to identify near-field phenomena from those related to light wave propagation (Ohtsu and Hori 1999). A rapid progress in near-field optics and nano-photonics has been made in the last two decades based on the developments of nano-fabrication techniques, scanning probe microscopy, and precision laser spectroscopy, and brought us with both the theoretical and the experimental backgrounds enough to study the dissipation processes and hierarchy properties of near-field interactions in relation to innovation in functional devices and systems.

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