MechE Colloquium: 3D printed microoptics: State of the art and future challenges

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Date 09.11.2021 12:1513:15  
Speaker Prof. Harald Giessen, Faculty of Mathematics and Physics, University of Stuttgart
Location Online
Category Conferences - Seminars
Event Language English
Abstract:
3D printing using femtosecond lasers gives submicron resolution when polymerizing plastics by two-photon absorption. The small voxel size well below the diffraction limit and the combination with high-speed scanners and high-precision piezo stages allows for the creation of millimeter-sized 3D optics with unprecedented design freedom. We will demonstrate that such complex optics with aspherical and freeform surfaces without rotational symmetry can lead to novel miniature optics with wavefront aberrations as small as lambda/10. Multiple materials can be combined with different refractive indices and dispersions, thus allowing for Fraunhofer-type achromats. Diffractive optics can be 3D printed as well, and stacking several Fresnel-type surfaces leads to aplanatic imaging systems. Hybrids that combine diffractive and refractive surfaces as well as transparent and opaque materials enhance the imaging capabilities even further. When combined with imaging fibers or CMOS imaging sensors, an entire new class of miniature optical devices can be created which will revolutionize augmented and virtual reality as well as self-driving cars. Fiber-based optical trapping, side-looking OCT endoscopes, the smallest imaging endoscope in the world, as well as applications in quantum technology pave the way towards future functionalities and applications [1-7].

[1] T. Gissibl et al., Optica 3, 448 (2016)        .
[2] T. Gissibl et al., Nature Communications 7, 11763 (2016).        
[3] T. Gissibl et al., Nature Photonics 10, 554 (2016).   
[4] S. Thiele et al., Opt. Lett. 41, 3029 (2016).                 
[5] S. Thiele et al., Science Advances 3, e1602655 (2017); S. Fischbach et al., ACS Photonics 4, 1327 (2017).           
[6] M. Sartison et al., Sci. Rep. 7, 39916 (2017).             
[7] M. Schmid et al., Opt. Lett. 43, 5837 (2018).

Bio:
Harald Giessen (*1966) graduated from Kaiserslautern University with a diploma in Physics and obtained his M.S. and Ph.D. in Optical Sciences from the University of Arizona in 1995 as J.W. Fulbright scholar. After a postdoc at the Max-Planck-Institute for Solid State Research in Stuttgart he moved to Marburg as assistant professor. From 2001-2004, he was associate professor at the University of Bonn. Since 2005, he is full professor and holds the Chair for Ultrafast Nanooptics in the Department of Physics at the University of Stuttgart. He is also co-chair of the Stuttgart Center of Photonics Engineering, SCoPE. He was guest researcher at the University of Cambridge, and guest professor at the University of Innsbruck and the University of Sydney, at A*Star, Singapore, as well as at Beijing University of Technology. He is associated researcher at the Center for Disruptive Photonic Technologies at Nanyang Technical University, Singapore. He received an ERC Advanced Grant in 2012 for his work on complex nanoplasmonics. He was co-chair (2014) and chair (2016) of the Gordon Conference on Plasmonics and Nanophotonics. He was general chair of the conference Photonics Europe (Strasbourg 2018) and is co-chair of the biannual conference NanoMeta in Seefeld, Austria. He is on the advisory board of the journals "Advanced Optical Materials", "Nanophotonics: The Journal", "ACS Photonics", "ACS Sensors", and "Advanced Photonics". He is a topical editor for ultrafast nanooptics, plasmonics, and ultrafast lasers and pulse generation of the journal "Light: Science & Applications" of Nature Publishing Group. He is a Fellow of the Optical Society of America. In 2018, 2019,2020 and 2021, he was named „Highly Cited Researcher“ (top 1%) by the Institute of Scientific Information. In 2021, he was elected as a Full Member into the Honor Society Sigma Xi. In 2021, he was awarded the Gips-Schüle Research Prize together with Simon Thiele and Alois Herkommer for his pioneering work on 3D printed microoptics. His research interests include Ultrafast Nano-Optics, Plasmonics, Metamaterials, 3D Printed Micro- and Nano-Optics, Medical Micro-Optics, Miniature Endoscopy, Novel mid-IR Ultrafast Laser Sources, Applications in Microscopy, Biology, and Sensing.
 

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MechE Colloquium: Prof. Harald Giessen University of Stuttgart

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