Mainz 2026 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 40: Poster – Photonics

Q 40.15: Poster

Mittwoch, 4. März 2026, 17:00–19:00, Philo 1. OG

Refractive index characterization and luminescence spectra of photoresists for 3D printing — •Leonardo Guimaraes, Leander Siegle, and Harald Giessen — 4th Physics Institute and Research Center SCoPE, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany

With the development of two-photon polymerization 3D printers, optical and mechanical characterization of their printing material, the photoresist, became crucial. Properties such as transmission have been well characterized recently. The luminescence of these photoresists, of major interest for biomedicine and quantum applications, however, has been underreported. In this work, we characterize the spectral response at multiple excitation wavelengths in the ultra-violet and visible. The refractive index of these photoresists is a key parameter for any optical component. We measure the refractive index of several photoresists over the visible and near-infrared spectral region. Our data shortens the search for the ideal photoresist across a different range of applications, be it the required low autofluorescence necessary for biomedicine, quantum light devices, or optimal refractive index for micro-optical components.

Keywords: 3D printing; photoresists; characterization; luminescence; refractive index