 Extraordinary optical transmission through sub-wavelength hole arrays by T. W. Ebbesen and others

T. W. Ebbesen, H. J. Lezec, H. F. Ghaemi, T. Thio and P. A. Wolff, Nature 391, 667–669 (1998), DOI 10.1038/35570. Page 667 and Figures 1–3: focused-ion-beam apertures in metal films, zero-order optical transmission and angle-dependent peaks. Primary paper scan: web.stanford.edu/class/ee349/Handouts/Nature02121998.pdf