We investigated an imaging method by nanoscale localization sampling (NLS) to break an optical diffraction limit. NLS is a technique based on locally amplified hot spots occurred by surface plasmon localization on nanohole arrays. For experimental verification, we sampled rhodamine-labeled microtubules on nanohole arrays using total internal reflection fluorescence (TIRF) microscopy. The resolution enhancement is achieved at 76 nm resolution in the direction of a incident light and 135 nm orthogonally. Optimization of nanostructures is suggested for further reduction of resolution as well.

© 2011 Optical Society of America

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