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(a) Schematic of the setup; (b) virtual image formation by a liquid-immersed sphere; (c) SEM image of an array of gold dimers formed by 120 nm nanoparticles with 150 nm separations; (d) BTG sphere with n ∼ 1.9 immersed in IPA; (e) virtual imaging of the array shown in (c) through the microsphere at a different depth compared to (d) by 100× (NA = 0.9) objective; (f) SEM image of a Blu-ray disk with 200 nm width stripes separated by 100 nm width grooves; (g) BTG microspheres with diameters in the range ∼5–20 μm fully immersed in IPA; and (h) virtual imaging of the Blu-ray disk through the microspheres at a different depth compared to (g) by 20× (NA = 0.4) objective.
(a) A BTG microsphere with n ∼ 1.9 and D ∼ 125 μm fully immersed in IPA at the top of the NPD array with 150 nm separations, and (b) imaging through this microsphere by 100× (NA = 0.9) objective lens illustrating >20 μm super-resolution FOV; (c) BTG microsphere with n ∼ 2.1 and D ∼ 53 μm fully immersed in IPA at the top of a BD, and (d) imaging through this microsphere by 20× (NA = 0.4) objective lens illustrating the 100 nm grooves of the BD.
(a) SEM image of an array of gold NPDs formed by 120 nm nanoparticles with 120 nm separations and resolving power of BTG microspheres with n ∼ 1.9 and different diameters D: (b) −4.2 μm, (c) −21.5 μm, and (c) −53 μm. Insets show the optical microscope images obtained in (b)–(d) cases corresponding to SEM image in (a).
BD samples imaged by a BTG microsphere with n ∼ 1.9 with polarizer's axis (a) parallel to the stripes, (b) no polarizer, and (c) perpendicular to the stripes.
(a) Lateral magnification and (b) FOV obtained by BTG microspheres with n ∼ 1.9 as a function of D. The inset in (b) illustrates FOV for a sphere with D = 9 μm. The measurements were performed using the NPD array. The dashed lines are guides for an eye.
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