Mainz 2026 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 40: Poster – Photonics
Q 40.14: Poster
Mittwoch, 4. März 2026, 17:00–19:00, Philo 1. OG
Integrated Optics for efficient Fluorescent collection for single NV centers — •Robert Bruss1, Lucas Kirchbach1,2, and Andreas Stute1,2 — 1Faculty AMP, Keßlerpl. 12, 90489 Nürnberg — 2Faculty EFI, Wassertorstr. 10, 90489 Nürnberg
Efficient collection of fluorescence light is essential for all optically adressable qubit platforms. For the nitrogen-vacancy (NV) center in diamond, the high refractive index of the host medium poses a major challenge as it limits the solid angle under which fluorescence light can leave the crystal. To enhance collection efficiency from single NV centers, we design and simulate micro-optical elements that shall be directly fabricated on the diamond surface using two-photon polymerization. Several optical designs and photoresists are evaluated for their expected coupling efficiency into single-mode fibers and their tolerance to fabrication errors. Additionally, an analytical solution for single lens collimation of the emission of a point source in diamond at a specific wavelength is presented, as well as considerations regarding the degradation of wavefront quality in multi-wavelength Fresnel designs.
Keywords: Diamond; NV-Center; Fiber; Efficiency; Tolerancing