Large diameter multilevel graded nanostructured microlens

Jedrzej Nowosielski; Ryszard Buczynski; Andrew J. Waddie; Adam Filipkowski; Dariusz Pysz; Aongus McCarthy; Ryszard Stepien; Mohammad R. Taghizadeh

doi:10.1117/12.922919

8 May 2012 Large diameter multilevel graded nanostructured microlens

Jedrzej Nowosielski, Ryszard Buczynski, Andrew J. Waddie, Adam Filipkowski, Dariusz Pysz, Aongus McCarthy, Ryszard Stepien, Mohammad R. Taghizadeh

Author Affiliations +

Proceedings Volume 8428, Micro-Optics 2012; 84280Q (2012) https://doi.org/10.1117/12.922919
Event: SPIE Photonics Europe, 2012, Brussels, Belgium

Abstract

In this paper we report on the fabrication, optical properties and imaging capabilities of nanostructured gradient index microlenses with diffraction limited performance and good chromatic behaviour. We introduce a new fabrication concept for the development of large diameter nanostructured gradient index microlenses based on quantised gradient index profiles and the use of nanostructured meta-rods. We show the dependence of the quality of performance on the number of refractive index levels and the overall lens diameter. The practical limit of the proposed method for fabricating nanostructured GRIN microlenses is determined to be 120μm for 7 discrete levels of nanostructured meta-rod refractive index. The fabricated microlenses show good achromatic behaviour - the observed working distances for illumination at wavelengths of 633 nm and 850 nm are 43μm and 40μm, respectively, while the focal spot sizes remain the same for both wavelengths

Citation Download Citation

Jedrzej Nowosielski, Ryszard Buczynski, Andrew J. Waddie, Adam Filipkowski, Dariusz Pysz, Aongus McCarthy, Ryszard Stepien, and Mohammad R. Taghizadeh "Large diameter multilevel graded nanostructured microlens", Proc. SPIE 8428, Micro-Optics 2012, 84280Q (8 May 2012); https://doi.org/10.1117/12.922919

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