Achromatic nanostructured gradient index microlenses

R. Buczynski*, A. Filipkowski, B. Piechal, H. T. Nguyen, D. Pysz, R. Stepien, A. Waddie, M. R. Taghizadeh, M. Klimczak, R. Kasztelanic

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)
183 Downloads (Pure)


We present a development of microlenses achromatically corrected in near-infrared spectral windows. We show that the standard fiber drawing technology can be successfully applied to the development achromatic gradient index microlenses by means of internal nanostructurization. These gradient index microlenses can achieve similar performance to standard aspheric doublets, while utilizing a simpler, singlet element geometry with flat surfaces. A nanostructured lens with a parabolic profile was designed using a combination of the simulated annealing method and the effective medium approximation theory. Measurements on the fabricated lenses show that the microlenses have a nearly wavelength-independent focal plane at a distance of about 35 μm from the lens facet over the wavelength range of 600–1550 nm. The successful design and fabrication of achromatic flat-parallel rod microlenses opens new perspectives for micro-imaging systems and wavelength-independent coupling into optical fibers.

Original languageEnglish
Pages (from-to)9588-9600
Number of pages13
JournalOptics Express
Issue number7
Early online date19 Mar 2019
Publication statusPublished - 1 Apr 2019

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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