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Nano Lett. 2015 Feb 11;15(2):1362-7. doi: 10.1021/nl504640e. Epub 2015 Jan 26.

Super-resolution in label-free photomodulated reflectivity.

Author information

1
School of Chemistry, The Raymond and Beverly Sackler Faculty of Exact Sciences and ‡The Center for Nanoscience and Nanotechnology, Tel Aviv University , Tel Aviv 69978, Israel.

Abstract

We demonstrate a new, label-free, far-field super-resolution method based on an ultrafast pump-probe scheme oriented toward nanomaterial imaging. A focused pump laser excites a diffraction-limited spatial temperature profile, and the nonlinear changes in reflectance are probed. Enhanced spatial resolution is demonstrated with nanofabricated silicon and vanadium dioxide nanostructures. Using an air objective, resolution of 105 nm was achieved, well beyond the diffraction limit for the pump and probe beams and offering a novel kind of dedicated nanoscopy for materials.

KEYWORDS:

Super resolution; label-free; microscopy; semiconductors; ultrafast optics

PMID:
25603405
DOI:
10.1021/nl504640e
[Indexed for MEDLINE]

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