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The experimental extinction spectra of, and corresponding electric field distributions (|E|2) at wavelength of 350 nm calculated for, (A) Au nanospheres (13 nm), (B) Au nanospheres (50 nm), and (C) Au nanorods compared with absorption spectra of azobenzene. Electric field distributions (|E|2) calculated for (D) Au nanosphere (diameter 13 nm); (E) Au nanosphere (diameter 50 nm); (F) Au nanorod (13 nm × 60 nm).
