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Article Dans Une Revue Chinese Optics Letters Année : 2019

Diffraction-limited microfocusing generated by polymer microlines separated by 1.12 μm

Résumé

The diffraction of a dielectric microline pair is optimized by numerical simulations to generate an efficient focus-ing pattern with a micron-scale footprint. Microlines separated by 1.12 μm are fabricated by two-photon polym-erization on a glass substrate, and their diffraction pattern is characterized by three-dimensional wide-field transmission microscopy. A line pair, having a width W ¼ 0.40 μm and a height H ¼ 0.80 μm, leads to diffraction-limited focusing in the visible spectrum. Depending on wavelength, its focal length, lateral resolution, and depth of focus are in the ranges of 0.8-1.3 μm, 0.22-0.44 μm, and 1.7-2.13 μm, respectively. Such a microlens based on the diffraction of only two subwavelength scatterers could be used for the design of miniature optical sensors with micron and sub-micron pixels.
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Dates et versions

hal-02406435 , version 1 (17-12-2019)

Identifiants

Citer

Azeddine Tellal, Omar Ziane, Patrice L. Baldeck. Diffraction-limited microfocusing generated by polymer microlines separated by 1.12 μm. Chinese Optics Letters, 2019, 17 (8), pp.082201. ⟨10.3788/COL201917.082201⟩. ⟨hal-02406435⟩

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