K. Allen, Navid Farahi, Yangcheng Li, N. Limberopoulos, D. Walker, A. Urbas, V. Astratov
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Super-resolution imaging by arrays of high-index spheres embedded in transparent matrices
We fabricated thin-films made from polydimethylsiloxane (PDMS) with embedded high-index (n~1.9-2.2) microspheres for super-resolution imaging applications. To control the position of microspheres, such films can be translated along the surface of the nanoplasmonic structure to be imaged. Microsphere-assisted imaging, through these matrices, provided lateral resolution of ~λ/7 in nanoplasmonic dimer arrays with an illuminating wavelength λ=405 nm. Such thin films can be used as contact optical components to boost the resolution capability of conventional microscopes.
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