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New Science Article

17.03.2017

Symbolic image of light interacting with a gold surface with 4-fold symmetric Archimedean spirals: Plasmons with orbital angular momentum are excited and swirl towards the center. © University of Stuttgart, Image by Sven Hein.
Symbolic image of the time-resolved dynamics of plasmons with orbital angular momentum: The interaction of light is indicated, and the individual snapshots at different times indicate the plasmons with orbital angular momentum. The 4-fold vortex in the center is swirling around. The black and white images are actual data from the electron imaging experiments. © University of Stuttgart, Image by Florian Sterl and Nikolai Strohfeldt.
Experimental setup: a femtosecond laser pulse impinges onto a single crystalline, atomically flat gold sample, where a nanostructure has been cut into by ion-beam milling. Plasmons are excited. At high plasmon intensities, electrons are liberated, which are then imaged in an electron microscope. By sending in two laser pulses with a certain time delay and recording the electron microscopy images, entire movies can be composed of those snapshots, revealing the femtosecond dynamics of the plasmons with orbital angular momentum. © University of Duisburg-Essen.
Electron microscopy images of long-range surface plasmons in a sample with orbital angular momentum of l=10. Upper row: Experiments. Bottom row: Simulations. © University of Kaiserslautern and Technion, Haifa, Experimental image taken by Deirdre Kilbane. Theoretical simulation by Grisha Spektor.
Experimental electron microscopy images of short-range surface plasmons with orbital angular momentum l=4. © University of Duisburg-Essen, Image taken by Frank Meyer zu Heringdorf, Philip Kahl, and Daniel Podbiel.

Experimental electron microscopy images of short-range surface plasmons with orbital angular momentum l=4. © University of Duisburg-Essen. Image taken by Frank Meyer zu Heringdorf, Philip Kahl, and Daniel Podbiel.

Our new Science article Revealing the subfemtosecond dynamics of orbital angular momentum in nanoplasmonic vortices by Grisha Spektor, Deirdre Kilbane, Anna-Katharina Mahro, Bettina Frank, Simon Ristok, Lior Gal, Philip Kahl, Daniel Podbiel, Stefan Mathias, Harald Giessen, Frank-Joachim Meyer zu Heringdorf, Meir Orenstein, and Martin Aeschliemann has now been published.

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New Science Advances Article

15.02.2017

 Working principle of foveated imaging: Four lenses with different focal lengths image the object. The information is later combined digitally.
3D printing process directly onto the CMOS chip.
CMOS sensor with different lenses in groups of four.
Scanning electron microscope image of a section through a micro-objective lens.
Comparison of imaging performance for the foveated (left) and the non-foveated case (right).

Our new Science Advances article 3D-printed eagle eye: Compound microlens system for foveated imaging by Simon Thiele, Kathrin Arzenbacher, Timo Gissibl, Harald Giessen, and Alois Herkommer has now been published.

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AvH Fellowship

20.12.2016

Our former PhD student and postdoc Dr. Bernd Metzger (JILA, Boulder, University of Colorado) received an AvH fellowship for carrying out research in the group of Prof. Markus Raschke at the University of Colorado, USA. Congratulations!

New Cover Art

23.09.2016

Our new ACS Sensors article Large-Area Low-Cost Plasmonic Perfect Absorber Chemical Sensor Fabricated by Laser Interference Lithography appeared on the cover of volume 1, number 9.

New Nature Photonics Article

27.06.2016

Our new Nature Photonics article Two-photon direct laser writing of ultracompact multi-lens objectives by Timo Gissibl, Simon Thiele, Alois Herkommer, and Harald Giessen has now been published.


Regular arrangement of doublet lenses directly fabricated on a CMOS image sensor.
Image of a multi-lens system with a diameter of 600 µm next to a doublet lenses with a diameter of 120 µm.
Image of a multi-lens system with a diameter of 600 µm surrounded by four doublet lenses with a diameter of 120 µm.
Colored SEM-image of a miniature triplet lens directly fabricated on an optical fiber.
Colored SEM-image of a miniaturized triplet lens compared to a hair.
Colored SEM-image of a miniaturized triplet lens coming out of a cannula.


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