Browsing by Subject "Optical properties"

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  • Additive manufacturing of reflective optics: Evaluating finishing methods 
    Leuteritz, Georg; Lachmayer, Roland (Bellingham, WA : SPIE - International Society for Optical Engineering, 2018)
    Individually shaped light distributions become more and more important in lighting technologies and thus the importance of additively manufactured reflectors increases significantly. The vast field of applications ranges ...
  • Ag+, Fe3+ and Zn2+-intercalated cadmium(II)-metal-organic frameworks for enhanced daylight photocatalysis 
    Surib, Nur Atiqah; Sim, Lan Ching; Leong, Kah Hon; Kuila, Aneek; Saravanan, Pichiah; Lo, Kong Mun; Ibrahim, Shaliza; Bahnemann, Detlef W.; Jang, Min (Cambridge : Royal Society of Chemistry, 2017)
    Design and synthesis of multi-dimensional metal-organic frameworks are fascinating because MOFs possess intriguing structures and unique properties and exhibit potential applications in photocatalysis. In the present study, ...
  • Anisotropic characteristics analysis of 3D-printed optics 
    Grabe, Tobias; Biermann, Tobias; Bayerl, Maximilian; Lachmayer, Roland (Erlangen : Deutsche Gesellschaft für angewandte Optik, 2020)
    The Additive Manufacturing of transparent materials enables cost efficient rapidprototyping of optically transparent components. The components are built layer-by-layer which can cause anisotropic optical properties. We ...
  • CdS crown growth on CdSe nanoplatelets : Core shape matters 
    Schlosser, Anja; Graf, Rebecca T.; Bigall, Nadja C. (Cambridge : Royal Society of Chemistry, 2020)
    Cadmium chalcogenide nanoplatelets (NPLs) have gained tremendous attention in the past decade due to their extremely narrow optical features and their special electronic properties. For the application of the NPLs as optical ...
  • Electrical and optical properties linked to laser damage behavior in conductive thin film materials 
    Steinecke, Morten; Naran, Tank Ankit; Keppler, Nils Christian; Behrens, Peter; Jensen, Lars; Jupé, Marco; Ristau, Detlev (Washington, DC : OSA - The Optical Society, 2021)
    Epsilon-near-zero-materials (ENZ-materials) and their unique properties are key to the successful integration and miniaturization of optical components. Novel concepts, which promise significant progress in this field of ...
  • Fabrication of a monolithic lab-on-a-chip platform with integrated hydrogel waveguides for chemical sensing 
    Torres-Mapa, Maria Leilani; Singh, Manmeet; Simon, Olga; Mapa, Jose Louise; Machida, Manan; Günther, Axel; Roth, Bernhard; Heinemann, Dag; Terakawa, Mitsuhiro; Heisterkamp, Alexander (Basel : MDPI AG, 2019)
    Hydrogel waveguides have found increased use for variety of applications where biocompatibility and flexibility are important. In this work, we demonstrate the use of polyethylene glycol diacrylate (PEGDA) waveguides to ...
  • ITO-free metallization for interdigitated back contact silicon heterojunction solar cells 
    Stang, Johann-Christoph; Hendrichs, Max-Sebastian; Merkle, Agnes; Peibst, Robby; Stannowski, Bernd; Korte, Lars; Rech, Bernd (London : Elsevier Ltd., 2017)
    We report on two different approaches to fabricate interdigitated back contact silicon heterojunction solar cells without using indium tin oxide (ITO). The standard ITO/Ag backend is either modified by replacing ITO with ...
  • Numerical analysis of the ultra-wide tunability of nanofiber Bragg cavities 
    Takashima, Hideaki; Schell, Andreas W.; Takeuchi, Shigeki (Washington, DC : Optica, 2023)
    Nanofiber Bragg cavities (NFBCs) are solid-state microcavities fabricated in optical tapered fiber. They can be tuned to a resonance wavelength of more than 20 nm by applying mechanical tension. This property is important ...
  • Optical properties of the human round window membrane 
    Höhl, Martin; Detemple, Daphne; Lyutenski, Stefan; Leuteritz, Georg; Varkentin, Arthur; Schmitt, Heike Andrea; Lenarz, Thomas; Roth, Bernhard; Meinhardt-Wollweber, Merve; Morgner, Uwe (Bellingham, WA : S P I E - International Society for Optical Engineering, 2017)
    Optical techniques are effective tools for diagnostic applications in medicine and are particularly attractive for the noninvasive analysis of biological tissues and fluids in vivo. Noninvasive examinations of substances ...
  • Optimizing the Solar Cell Front Side Metallization and the Cell Interconnection for High Module Power Output 
    Witteck, Robert; Schulte-Huxel, Henning; Holst, Hendrik; Hinken, David; Vogt, Malte R.; Blankemeyer, Susanne; Köntges, Marc; Bothe, Karsten; Brendel, Rolf (London : Elsevier Ltd., 2016)
    Improving the light trapping in a module results in an increase in the generated current. Consequently, an optimization of the front grid metallization of the cell is required for the best trade-off between series resistance, ...
  • Parasitic Absorption in Polycrystalline Si-layers for Carrier-selective Front Junctions 
    Reiter, Sina; Koper, Nico; Reineke-Koch, Rolf; Larionova, Yevgeniya; Turcu, Mircea; Krügener, Jan; Tetzlaff, Dominic; Wietler, Tobias; Höhne, Uwe; Kähler, Jan-Dirk; Brendel, Rolf; Peibst, Robby (London : Elsevier Ltd., 2016)
    We investigate the optical properties of n- and p-type polycrystalline silicon (poly-Si) layers. We determine the optical constants n and k of the complex refractive index of polycrystalline silicon by using variable-angle ...
  • Quantum noise limits to simultaneous quadrature amplitude and phase stabilization of solid-state lasers 
    Huntington, E.H.; Harb, C.C.; Heurs, Michèle; Ralph, T.C. (College Park, MD : American Physical Society, 2007)
    A quantum mechanical model is formulated to describe the coupling between pump intensity noise and laser frequency noise in a solid-state laser. The model allows us to investigate the limiting effects of closed-loop ...
  • Revealing the Effect of Nanoscopic Design on the Charge Carrier Separation Processes in Semiconductor-Metal Nanoparticle Gel Networks 
    Schlenkrich, Jakob; Zámbó, Dániel; Schlosser, Anja; Rusch, Pascal; Bigall, Nadja C. (Weinheim : Wiley-VCH, 2022)
    In this paper, it is shown that the nanoscopic design of combining semiconductors and noble metals has a direct impact on the macroscopic (electrochemical) properties of their assembled, hyperbranched, macroscopic gel ...
  • Reversible Photoalignment of Azobenzene in the SURMOF HKUST-1 
    Koehler, Tillmann; Strauss, Ina; Mundstock, Alexander; Caro, Jürgen; Marlow, Frank (Washington, DC : ACS, 2021)
    Azobenzene guest molecules in the metal-organic framework structure HKUST-1 show reversible photochemical switching and, in addition, alignment phenomena. Since the host system is isotropic, the orientation of the guest ...
  • Simulation in thin film technology 
    Turowski, Marcus; Jupé, Marco; Ehlers, Henrik; Melzig, Thomas; Pflug, Andreas; Ristau, Detlev (Bellingham, WA : S P I E - International Society for Optical Engineering, 2015)
    Simulation and modeling find more and more their way into thin film technology. Beside theoretical models for layer design, pre-production design analysis, and real time process control, atomistic simulation techniques ...
  • Single photon emission from ODT passivated near-surface GaAs quantum dots 
    Cao, Xin; Yang, Jingzhong; Li, Pengji; Zhang, Yiteng; Rugeramigabo, Eddy P.; Brechtken, Benedikt; Haug, Rolf J.; Zopf, Michael; Ding, Fei (Melville, NY : American Inst. of Physics, 2021)
    Epitaxially grown semiconductor quantum dots are promising candidates for pure single photon and polarization-entangled photon pair emission. Excellent optical properties can typically be ensured only if these so-called ...
  • Spatially-targeted laser fabrication of multi-metal microstructures inside a hydrogel 
    Machida, Manan; Niidome, Takuro; Onoe, Hiroaki; Heisterkamp, Alexander; Terakawa, Mitsohiro (Washington, DC : OSA - The Optical Society, 2019)
    The spatially-targeted fabrication of bimetallic microstructures coexisting in the supporting hydrogel is demonstrated by multi-photon photoreduction. Microstructures composed of gold and silver were fabricated along a ...
  • Surface plasmons on ordered and bi-continuous spongy nanoporous gold 
    Sardana, Neha; Birr, Tobias; Schlenker, Sven; Reinhardt, Carsten; Schilling, Jörg (Bristol : IOP Publishing Ltd., 2014)
    The dispersion relation and propagation of surface plasmons polaritons (SPPs) on nanoporous gold films is experimentally investigated and an increasing red shift of the SPPs is observed with rising porosity. This is caused ...