[1] [1] D. W. Pohl, W. Denk, and M. Lanz, Appl. Phys. Lett. 44, 651 (1984).

[2] [2] E. Betzig, J. K. Trautman, T. D. Harris, J. S. Weiner, and R. L. Kostelak, Science 251, 1468 (1991).

[3] [3] P. Hoffmann, B. Dutoit, and R. Salathe, Ultramicroscopy 61, 165 (1995).

[4] [4] O. Sqalli, M.-P. Bernal, P. Hoffmann, and F. Marquis-Weible, Appl. Phys. Lett. 76, 2134 (2000).

[5] [5] A. Partovi, D. Peale, M. Wuttig, C. A. Murray, G. Zydzik, L. Hopkins, K. Baldwin, W. S. Hobson, J. Wynn, J. Lopata, L. Dhar, R. Chichester, and J. H. Yeh, Appl. Phys. Lett. 75, 1515 (1999).

[6] [6] T. W. Ebbesen, H. J. Lezec, H. F. Ghaemi, T. Thio, and P. A. Wolff, Nature 391, 667 (1998).

[7] [7] T. Thio, K. M. Pellerin, R. A. Linke, H. J. Lezec, and T. W. Ebbesen, Opt. Lett. 26, 1972 (2001).

[8] [8] H. J. Lezec, A. Degiron, E. Devaux, R. A. Linke, L. Martin-Moreno, F. J. Garcia-Vidal, and T. W. Ebbesen, Science 297, 820 (2002).

[9] [9] L. Martin-Moreno, F. J. Garcia-Vidal, H. J. Lezec, A. Degiron, and T. W. Ebbesen, Phys. Rev. Lett. 90, 167401 (2003).

[10] [10] X. Shi, H. Lambertus, and L. T. Robert, Opt. Lett. 28, 1320 (2003).

[11] [11] J. Wei and F. Gan, Appl. Phys. Lett. 82, 2607 (2003).

[12] [12] A. Taflove and S. Hagness, Computational Electrodynamics: The Finite-Difference Time-Domain Method (2nd edn.) (Artech House, Boston, 2000).

[13] [13] RSoft is a commercial package for photonic design and simulation. Website: http://www.rsoftdesign.com.