Zeitschriftenaufsätze, Buchbeiträge

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Hofmann, Martin; Mohr-Weidenfeller, Laura; Supreeti, Shraddha; Mechold, Stephan; Holz, Mathias; Reuter, Christoph; Sinzinger, Stefan; Manske, Eberhard; Rangelow, Ivo W.
Mix-and-match lithography and cryogenic etching for NIL template fabrication. - In: Microelectronic engineering, Bd. 224 (2020), 111234

https://doi.org/10.1016/j.mee.2020.111234
Schmidt, Leander; Nagel, Falk; Schricker, Klaus; Bergmann, Jean Pierre; Bourgin, Yannick; Wüster, Julian; Sinzinger, Stefan
Spritzerarmes Laserstrahlschweißen bei hohen Schweißgeschwindigkeiten unter Einsatz angepasster Intensitätsverteilungen. - In: Schweissen und Schneiden, ISSN 0036-7184, Bd. 71 (2019), 8, S. 520-527

Gharbi Ghebjagh, Shima; Fischer, David; Sinzinger, Stefan
Multifocal multi-value phase zone plate for 3D focusing. - In: Applied optics, ISSN 2155-3165, Bd. 58 (2019), 32, S. 8943-8949

We demonstrate a method for creating a three-dimensional (3D) array of focal spots by combination of a multi-focal diffractive lens and a two-dimensional multi-value phase grating. The multi-focal Fresnel-based lens is created by means of encoding special nonlinearities into the phase structure of a Fresnel zone plate and is represented as a mathematical superposition of this phase function with a refractive lens. The imposed nonlinearity type enables the creation of multiple focal spots with uniform intensity along the optical axis. We demonstrate the example of a 3D multi-value phase grating, which creates five focal planes with a 5×5 transverse array of focal spots with equal energy distribution in each plane. Experimental results are included to verify the theoretical outcomes, where the phase pattern of a 3D multi-value phase grating is encoded onto a spatial light modulator.



https://doi.org/10.1364/AO.58.008943
Kreismann, Jakob; Kim, Jaewon; Bosch, Martí; Hein, Matthias; Sinzinger, Stefan; Hentschel, Martina
Superdirectional light emission and emission reversal from microcavity arrays. - In: Physical review research, ISSN 2643-1564, Bd. 1 (2019), 3, S. 033171-1-033171-5

Optical microdisk cavities with certain asymmetric shapes are known to possess unidirectional far-field emission properties. Here, we investigate arrays of these dielectric microresonators with respect to their emission properties resulting from the coherent behavior of the coupled constituents. This approach is inspired by electronic mesoscopic physics where the additional interference effects are known to enhance the properties of the individual system. As an example, we study the linear arrangement of nominally identical Lima¸con-shaped cavities and find mostly an increase of the portion of directional emitted light while its angular spread is largely diminished from 20 deg for the single cavity to about 3 deg for a linear array of 10 Lima¸con resonators, in fair agreement with a simple array model. Moreover, by varying the intercavity distance, we observe windows of reversion of the emission directionality and superdirectionality that can be interesting for applications like optical sensing or interconnects. We introduce a generalized array factor model that takes the coupling into account.



https://doi.org/10.1103/PhysRevResearch.1.033171
Ramu Burada, Dali; Pant, Kamal K.; Mishra, Vinod; Bichra, Mohamed; Khan, Gufran Sayeed; Sinzinger, Stefan; Shakher, Chandra
Development of a metrology technique suitable for in situ measurement and corrective manufacturing of freeform optics. - In: Advanced Optical Technologies, ISSN 2192-8584, Bd. 8 (2019), 3/4, S. 203-215

The applications of freeform optical surfaces in modern optical systems are providing unique solutions over rotationally symmetric surfaces. These surfaces offer higher degrees of freedom to the designer to enhance the high-end performance of the optical system. The precise metrology of freeform optics is one of the major bottlenecks for its use in imaging applications. Modern optical fabrication methods (i.e. fast or slow tool servo configuration) are, in principle, capable to meet the challenges to generate complex freeform surfaces if supported by precise metrology feedback for error compensation. In the present work, we have developed a Shack-Hartmann sensor-based metrology technique that can be used for quantitative in situ measurement of freeform optics. The sensor head is used to measure freeform optics in the reflection mode by following the CNC tool path in the offline mode. The measurements are used as feedback for corrective machining. Quantitative analysis is also performed to estimate the error budget of the metrology system. Further, the proposed in situ metrology scheme is validated by measuring freeform surface using a coherence correlation interferometric optical profiler.



https://doi.org/10.1515/aot-2018-0072
Klee, Sascha; Link, Dietmar; Sinzinger, Stefan; Haueisen, Jens
Scotoma simulation in healthy subjects. - In: Optometry and vision science, ISSN 1538-9235, Bd. 95 (2018), 12, S. 1120-1128

https://doi.org/10.1097/OPX.0000000000001310
Weigel, Christoph; Sinzinger, Stefan; Hoffmann, Martin
Deep etched and released microstructures in Zerodur in a fluorine-based plasma. - In: Microelectronic engineering, Bd. 198 (2018), S. 78-84

https://doi.org/10.1016/j.mee.2018.07.004
Kampmann, Ronald; Sinzinger, Stefan; Korvink, Jan G.
Optical tweezers for trapping in a microfluidic environment. - In: Applied optics, ISSN 2155-3165, Bd. 57 (2018), 20, S. 5733-5742

https://doi.org/10.1364/AO.57.005733
Weigel, Christoph; Grewe, Adrian; Sinzinger, Stefan; Hoffmann, Martin
A microoptical sidestream cuvette based on fast passive gas exchange for capnography. - In: Sensors and actuators, ISSN 1873-3069, Bd. 276 (2018), S. 68-75

https://doi.org/10.1016/j.sna.2018.04.022
Bichra, Mohamed; Meinecke, Thomas; Feßer, Patrick; Müller, Lutz; Hoffmann, Martin; Sinzinger, Stefan
Freeform characterization based on nanostructured diffraction gratings. - In: Applied optics, ISSN 2155-3165, Bd. 57 (2018), 14, S. 3808-3816

https://doi.org/10.1364/AO.57.003808