16.04.2026          Antrittsvorlesungen | A. Mook (FT) und T. Heindel (Dept. QT)

Vortragsankündigung [PDF]

TBA

23.04.2026          N.N.

Vortragsankündigung [PDF]

TBA

tba

30.04.2026          CRC 1459 Colloquium

Vortragsankündigung [PDF]

TBA

07.05.2026          Prof. Harald Giessen (Universität Stuttgart)

Vortragsankündigung [PDF]

3D printed complex microoptics: Fundamentals and first benchmark applications

We introduce 3d printed complex microoptics, spanning a range between a few micrometers up to 5 mm. Our lens system consists of aspherical multiplet lens systems which can give high numerical apertures with simultaneously excellent imaginag properties over the entire field of view, even directly on an optical fiber tip. Combining several printed materials with different refractive indices and dispersions and the combination with diffractive elements allows for realization of micro-optical achromats or even apochromats which are aplanatic (no first- and third-order aberrations such as spherical aberration, astigmatism, coma, distortion etc.) and achromatic for 3 wavelengths (red, green, blue). We also demonstrate the direct printing of black resists, which results in aperture stops and blackened hulls.

Atomic layer deposition yields antireflection coatings on all optical elements. Confocal surface profiling and wavefront interferometry demonstrate accuracies far better than lambda/20. In combination with high-resolution nanostructuring, also 3D holograms and metasurfaces can be included.

We utilize these methods to demonstrate the smallest endoscope in the world, being able to pass through a root canal of a tooth, as well as ultracompact sensors with hologon or hypergon lenses or a set of Scheimpflug lenses with nearly 2pi steradian imaging solid angle. Illumination systems as well as holographic projectors and beam shapers directly on optical fiber tips are demonstrated. Coupling single quantum emitters or single photon detectors to single mode fibers is demonstrated. Furthermore, single-fiber optical trapping of polystyrene beads, live cells, or atomic systems becomes a possibility.

Recently, we also demonstrated the use of 3D printed optics inside of a laser cavity, connecting a DBR mirror in a fiber with a solid state laser crystal.

References

T. Gissibl, S. Thiele, A. Herkommer and H. Giessen, Two-photon direct laser writing of ultracompact multi-lens objectives, Nature Photonics 10, 554 (2016).

T. Gissibl, S. Thiele, A. Herkommer and H. Giessen, Sub-micrometre accurate free-form optics by three-dimensional printing on single-mode fibres, Nature Communications 7, 11763 (2016).

T. Gissibl, M. Schmid and H. Giessen, Spatial beam intensity shaping using phase masks on single mode optical fibers fabricated by femtosecond direct laser writing, Optica 3, 448 (2016).

S. Angstenberger, P. Ruchka, M. Hentschel, T. Steinle and H. Giessen, Hybrid fiber-solid-state laser with 3D-printed intracavity lenses, Opt. Lett. 24, 6549 (2023).

21.05.2026          N.N.

Vortragsankündigung [PDF]

TBA

tba

11.06.2026          Prof. Andreas Zumbusch (Universität Konstanz)

Vortragsankündigung [PDF]

Spektroskopie - Glasübergang in kolloidalen Systemen

tba

18.06.2026          N.N.

Vortragsankündigung [PDF]

TBA

tba

25.06.2026          IG1 SOMMERFEST

... Infos folgen

02.07.2026          Prof. Tatyana Galatyuk (TU Darmstadt)

Vortragsankündigung [PDF]

TBA

tba

09.07.2026          Dr. Karsten Haustein (Univ. Leipzig) & LEHRPREIS-Vergabe

Vortragsankündigung [PDF]

TBA

tba

16.07.2026          N.N.

Vortragsankündigung [PDF]

TBA

tba

23.07.2026          N.N.

Vortragsankündigung [PDF]

TBA

tba