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    Hybrid polymer microlens arrays with high numerical apertures fabricated using simple ink-jet printing technique

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    Kim, Joo Yeon; Brauer, Nils B.; Fakhfouri, Vahid; Boiko, Dmitri L.; Charbon, Edoardo; Grutzner, Gabi; Brugger, Juergen
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    Abstract
    Microlens arrays fabricated by a direct ink-jet printing of UV-curable hybrid polymer are reported. A periodic pattern of polymer drops was ink-jet printed on the surface-treated glass substrate and cured in the UV-light. Using this simple technique, we demonstrated periodic arrays of almost semi-spherical microlenses of 50 µm diameter size and a focal distance of 48µm. The optical characteristics of solitary µ-lenses and arrays comprising up to 64x64 microlenses are measured both in the near- and far-field zones. Large numerical aperture and short focal distance make the ink-jet printing of microlenses very attractive for applications in optical interconnects, large 2D VCSEL arrays and pixelated imagine sensors utilizing CCD or SPAD arrays, offering thus an efficient, simple and a cheap alternative to the conventionally used photolithography technique.
    Publication Reference
    Optical Materials Express, vol. 1 (2), pp. 259-269
    Year
    2011-06-01
    URI
    https://yoda.csem.ch/handle/20.500.12839/764
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