Super-Resolution in Label-Free Photomodulated Reflectivity

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• 作者：Omer Tzang ; Alexander Pevzner ; Robert. E. Marvel ; Richard. F. Haglund ; Ori Cheshnovsky
• 刊名：Nano Letters
• 出版年：2015
• 出版时间：February 11, 2015
• 年：2015
• 卷：15
• 期：2
• 页码：1362-1367
• 全文大小：389K
• ISSN：1530-6992

文摘

We demonstrate a new, label-free, far-field super-resolution method based on an ultrafast pump鈥損robe 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.