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Physical origin of( devices; their particular attractions are their near-field characteran 22. Barnes, W.L Kitson. S C, Preist, T W. researchers to explore the underlying science and has already led to 23. kreibig, U. Vollmer. L Optical properties of sters(Springer, Berlin, 1995) beam splitters, enhanced transmission and beaming. Some of these ofsize-d厘上单mhmm abrfcatfon tool for studies components may find their way into the world of photonics as dis- 26 Sonnichsen, C. f al Spectroscopy of single metallic nanopartides using total intermal relection rete elements. The greater dream of making a completely plasmonic 27. Schutz,, A. Plasmon resonant particles for bologna detection. Cur. Opin. Biocechno. 14. 13-22 circuit will require much further research. It is an exciting challenge (20 thatisstimulating activity around the world. 2&Oldenburg, SI,Genick, C C Clark, K.A. Schultz, D A. Base pair mismatch recognition using onant partide labels. 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For this simulation there were 10 grooves on each side of the slit, each of width 40 nm and depth 100 nm. The groove period was 500 nm. The contour plot shows the spatial dependence of the component of the Poynting vector along the radial direction for a wavelength of 560 nm, corresponding to a spectral transmission maximum. Blue indicates low intensity (3210-4), and red high (1). © 2003 Nature PublishingGroup