Development of large diameter nanostructured GRIN microlenses enhanced with temperature-controlled diffusion

Adam Filipkowski (Corresponding Author), Hue Thi Nguyen, Rafał Kasztelanic, Tomasz Stefaniuk, Jaroslaw Cimek, Dariusz Pysz, Ryszard Stepien, Konrad Krzyzak, Pentti Karioja, Ryszard Buczynski (Corresponding Author)

    Research output: Contribution to journalArticleScientificpeer-review

    2 Citations (Scopus)

    Abstract

    Nanostructured GRIN components are optical elements which can have an arbitrary refractive index profile while retaining flat-parallel entry and exit facets. A method of their fabrication requires assembly of large quantities of glass rods in order to satisfy subwavelength requirement of the effective medium theory. In this paper, we present a development of gradient index microlenses using a combination of methods: nanostructurization of the preform and controlled diffusion process during lens drawing on a fiber drawing tower. Adding a diffusion process allows us to overcome limits of the effective medium theory related to maximum size of nanorods in the lens structure. We show that nanorods are dissolved during the fiber drawing process in high temperature and glass components are locally quasi-uniformly distributed. To demonstrate feasibility of the proposed approach, we have developed and experimentally verified the performance of a nGRIN microlens with a diameter of 115 µm composed of 115 rods on the diagonal, and length of 200 µm devoted to work for the wavelength over 658 nm.

    Original languageEnglish
    Pages (from-to)35052-35064
    Number of pages13
    JournalOptics Express
    Volume27
    Issue number24
    DOIs
    Publication statusPublished - 2019
    MoE publication typeA1 Journal article-refereed

    Keywords

    • OtaNano

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