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Fig. 8 | Nanoscale Research Letters

Fig. 8

From: Batch Fabrication of Broadband Metallic Planar Microlenses and Their Arrays Combining Nanosphere Self-Assembly with Conventional Photolithography

Fig. 8

a Optical microscope images for the fabricated 3 × 3 microlens array spacing 8 μm apart when d = 8 μm and the measured optical patterns (AA) under (a1) the single wavelength of λ = 532 nm and (a2) the broadband illumination. Identical foci from individual microlenses are observed. b Experimental results (BB) for the 3 × 3 microlens array spacing 4 μm under (b1) the single wavelength of λ = 532 nm and (b2) the broadband illumination. The coupling effect between two adjacent microlenses, as denoted by the regions C, D, and E, can be observed

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