Figre 1

Extinction spectrum of the GMN and SEM image of the stamp. (a) Extinction spectra of the GMN before (1) and after (2) the imprinting; the wavelengths of lasers used in the near-field experiments are marked with arrows: 633 (red arrow), 532 (green arrow), and 405 nm (violet arrow). The process of imprinting is schematically illustrated in the inset. (b) SEM image of the part of glassy carbon stamp used as a positive electrode for imprinting; first three grooves of 100-, 150-, and 200-nm linewidths are shown. The white arrow points to 150 nm groove.