Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Fraxicon for Optical Applications with Aperture ∼1 mm

Haoran Mu
ORCID logo ,
Daniel Smith
ORCID logo ,
Soon Hock Ng
* ORCID logo ,
Vijayakumar Anand
* ,
Nguyen Hoai An Le
,
Raghu Dharmavarapu
,
Zahra Khajehsaeidimahabadi
,
Rachael T. Richardson
ORCID logo ,
Patrick Ruther
,
Paul R. Stoddart
ORCID logo ,
Henrikas Gricius
,
Tomas Baravykas
,
Darius Gailevičius
,
Gediminas Seniutinas
,
Tomas Katkus
,
Saulius Juodkazis
Version 1 : Received: 19 November 2023 / Approved: 21 November 2023 / Online: 21 November 2023 (10:42:14 CET)

A peer-reviewed article of this Preprint also exists.

Mu, H.; Smith, D.; Ng, S.H.; Anand, V.; Le, N.H.A.; Dharmavarapu, R.; Khajehsaeidimahabadi, Z.; Richardson, R.T.; Ruther, P.; Stoddart, P.R.; Gricius, H.; Baravykas, T.; Gailevičius, D.; Seniutinas, G.; Katkus, T.; Juodkazis, S. Fraxicon for Optical Applications with Aperture ∼1 mm: Characterisation Study. Nanomaterials 2024, 14, 287. Mu, H.; Smith, D.; Ng, S.H.; Anand, V.; Le, N.H.A.; Dharmavarapu, R.; Khajehsaeidimahabadi, Z.; Richardson, R.T.; Ruther, P.; Stoddart, P.R.; Gricius, H.; Baravykas, T.; Gailevičius, D.; Seniutinas, G.; Katkus, T.; Juodkazis, S. Fraxicon for Optical Applications with Aperture ∼1 mm: Characterisation Study. Nanomaterials 2024, 14, 287.

Abstract

Emerging applications of optical technologies are driving the development of miniaturised light sources, which in turn require the fabrication of matching micro-optical elements with sub-1 mm cross sections and high optical quality. This is particularly challenging for spatially-constrained biomedical applications where reduced dimensionality is required, such as endoscopy, optogenetics, or optical implants. Planarisation of a lens by the Fresnel lens approach was adapted for a conical lens (axicon) and was made by direct femtosecond 780 nm/100 fs laser writing in SZ2080™polymer with photo-initiator. Optical characterisation of the positive and negative fraxicons is presented. Numerical modeling of fraxicon optical performance under illumination by incoherent and spatially extended light sources is compared with the ideal case of plane wave illumination. Considering the potential for rapid replication in soft polymers and resists, this approach holds great promise for the most demanding technological applications.

Keywords

fraxicon; micro-optics; RGB; SZ2080™resist; direct-laser-writing

Subject

Biology and Life Sciences, Biophysics

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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