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We report the high speed scanning submicronic microscopy (SSM) using a low cost polymer microlens integratedat the extremity of an optical fiber.These microlenses are fabricated by a free-radical photopolymerizationmethod.Using a polymer microlens with a radius of curvature of 250 nm,a sub-micrometricgold pattern is imaged experimentally by SSM.Different distances between the tip and the sample areused with a high scanning speed of 200 cm/s.In particular,metallic absorption contrasts are describedwith an optical spatial resolution of 250 nm at the wavelength of 532 nm.Moreover,finite-differencetime-domain (FDTD) simulations concerning the focal lengths of microlenses with different geometriesand heights support the experimental data.
We report the high speed scanning submicronic microscopy (SSM) using a low cost polymer microlens integratedat the extremity of an optical fiber. These microlenses are fabricated by a free-radical photopolymerization method. Using a polymer microlens with a radius of curvature of 250 nm, a sub-micrometricgold pattern is imaged experimentally by SSM. Different distances between the tip and the sample are used with a high scanning speed of 200 cm / s. In particular, metallic absorption contrasts are described with an optical spatial resolution of 250 nm at the wavelength of 532 nm. More over, finite-difference time-domain (FDTD) simulations concerning the focal lengths of microlenses with different geometries and heights support the experimental data.