@inproceedings{d3b8346ec7cd4cdca801ddb46b59ddf3,
title = "Optical microscopy with super-resolution by liquid-immersed high-index microspheres",
abstract = "We study super-resolution capability of liquid-immersed high refractive index (n∼1.9-2.1) barium titanate glass microspheres with diameters from several microns up to hundreds of microns. Imaging is provided in a conventional upright microscope with the spheres placed in a contact position with various semiconductor and metallic nanostructures. Using a commercial Blu-ray disk, we demonstrate an ability to discern 100 nm feature sizes which cannot be resolved by conventional microscopy. Using silver nanowires with diameter about 100 nm, we demonstrate ∼1.7 times improvement in spatial resolution compared to conventional diffraction-limited far field microscopy. Using two-dimensional nanoplasmonic arrays, we demonstrate high resolution imaging by using objectives with surprisingly small numerical apertures. The last property is attractive for high-resolution imaging at long working distances. This imaging technique can be used in biomedical microscopy, microfluidics, and nanophotonics applications.",
keywords = "Super-resolution, barium titanate glass, diffraction limit, microscopy, photonic nanojet, spatial resolution",
author = "Arash Darafsheh and Limberopoulos, {Nicholaos I.} and Derov, {John S.} and Walker, {Dennis E.} and Magdalena Durska and Krizhanovskii, {Dimitry N.} and Whittaker, {David M.} and Astratov, {Vasily N.}",
year = "2013",
doi = "10.1117/12.2005896",
language = "English",
isbn = "9780819493637",
series = "Progress in Biomedical Optics and Imaging - Proceedings of SPIE",
publisher = "SPIE",
booktitle = "Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications X",
note = "Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications X ; Conference date: 06-02-2013 Through 07-02-2013",
}