The Experts below are selected from a list of 75816 Experts worldwide ranked by ideXlab platform
Marija Strojnik - One of the best experts on this subject based on the ideXlab platform.
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ray trace in three dimensions through reflective confocal prolate spheroids
Second Iberoamerican Meeting on Optics, 1996Co-Authors: Gonzalo Paez, Marija StrojnikAbstract:Simple, recursive ray-trace equations are presented that describe exactly a ray propagating through a series of coupled, confocal, prolate spheroids. Vector formulation is employed for characterizing the ray propagation in different planes through the spheroid axis of symmetry.© (1996) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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ray trace equations through three dimensional reflective on axis confocal prolate spheroids
SPIE's 1995 International Symposium on Optical Science Engineering and Instrumentation, 1995Co-Authors: Marija StrojnikAbstract:Simple, recursive ray-trace equations are presented that exactly describe the propagation of a ray through a series of coupled, confocal, prolate spheroids. A vector representation is used for characterizing ray-propagation in different planes through the spheroid axis of symmetry.© (1995) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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recursive exact ray trace equations through tilted off axis confocal prolate spheroids
SPIE's 1995 International Symposium on Optical Science Engineering and Instrumentation, 1995Co-Authors: Marija StrojnikAbstract:Simple, exact ray trace equations are derived for a general ray propagating through tilted, coupled, confocal spheroids. In this off-axis Optical system, there does not necessarily exist a (real) ray for which the paraxial approximation applies.© (1995) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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simple recursive relations for ray tracing through confocal prolate spheroids
9th Meeting on Optical Engineering in Israel, 1995Co-Authors: Marija StrojnikAbstract:Simple, recursive ray-trace equations are presented that describe an exact ray propagation through a series of coupled confocal prolate spheroids.© (1995) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Alon A Gorodetsky - One of the best experts on this subject based on the ideXlab platform.
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cephalopod inspired Optical Engineering of human cells
Nature Communications, 2020Co-Authors: A Chatterjee, Juana Cerna A Sanchez, Toyohiko Yamauchi, Vanessa Taupin, Justin Couvrette, Alon A GorodetskyAbstract:Although many animals have evolved intrinsic transparency for the purpose of concealment, the development of dynamic, that is, controllable and reversible, transparency for living human cells and tissues has remained elusive to date. Here, by drawing inspiration from the structures and functionalities of adaptive cephalopod skin cells, we design and engineer human cells that contain reconfigurable protein-based photonic architectures and, as a result, possess tunable transparency-changing and light-scattering capabilities. Our findings may lead to the development of unique biophotonic tools for applications in materials science and bioEngineering and may also facilitate an improved understanding of a wide range of biological systems.
Yong Cao - One of the best experts on this subject based on the ideXlab platform.
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recent advances in organic photovoltaics device structure and Optical Engineering optimization on the nanoscale
Small, 2016Co-Authors: Guoping Luo, Xingang Ren, Su Zhang, Wallace C H Choy, Yong CaoAbstract:Organic photovoltaic (OPV) devices, which can directly convert absorbed sunlight to electricity, are stacked thin films of tens to hundreds of nanometers. They have emerged as a promising candidate for affordable, clean, and renewable energy. In the past few years, a rapid increase has been seen in the power conversion efficiency of OPV devices toward 10% and above, through comprehensive optimizations via novel photoactive donor and acceptor materials, control of thin-film morphology on the nanoscale, device structure developments, and interfacial and Optical Engineering. The intrinsic problems of short exciton diffusion length and low carrier mobility in organic semiconductors creates a challenge for OPV designs for achieving Optically thick and electrically thin device structures to achieve sufficient light absorption and efficient electron/hole extraction. Recent advances in the field of OPV devices are reviewed, with a focus on the progress in device architecture and Optical Engineering approaches that lead to improved electrical and Optical characteristics in OPV devices. Successful strategies are highlighted for light wave distribution, modulation, and absorption promotion inside the active layer of OPV devices by incorporating periodic nanopatterns/nanostructures or incorporating metallic nanomaterials and nanostructures.
Toyohiko Yamauchi - One of the best experts on this subject based on the ideXlab platform.
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cephalopod inspired Optical Engineering of human cells
Nature Communications, 2020Co-Authors: A Chatterjee, Juana Cerna A Sanchez, Toyohiko Yamauchi, Vanessa Taupin, Justin Couvrette, Alon A GorodetskyAbstract:Although many animals have evolved intrinsic transparency for the purpose of concealment, the development of dynamic, that is, controllable and reversible, transparency for living human cells and tissues has remained elusive to date. Here, by drawing inspiration from the structures and functionalities of adaptive cephalopod skin cells, we design and engineer human cells that contain reconfigurable protein-based photonic architectures and, as a result, possess tunable transparency-changing and light-scattering capabilities. Our findings may lead to the development of unique biophotonic tools for applications in materials science and bioEngineering and may also facilitate an improved understanding of a wide range of biological systems.
Sewoong Baek - One of the best experts on this subject based on the ideXlab platform.
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plasmonic forward scattering effect in organic solar cells a powerful Optical Engineering method
Scientific Reports, 2013Co-Authors: Sewoong BaekAbstract:In this report, plasmonic effects in organic photovoltaic cells (OPVs) are systematically analyzed using size-controlled silver nanoparticles (AgNPs, diameter: 10 ~ 100 nm), which were incorporated into the anodic buffer layer, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). The Optical properties of AgNPs tuned by size considerably influence the performance levels of devices. The power conversion efficiency (PCE) was increased from 6.4% to 7.6% in poly[N-9-hepta-decanyl-2,7-carbazole-alt-5,5-(4,7-di-2-thienyl-2,1,3-benzothiadiazole)] (PCDTBT):[6,6]-phenyl C71-butyric acid methyl ester (PC70BM) based-OPVs and from 7.9% to 8.6% in polythieno[3,4-b]thiophene/benzodithiophene (PTB7):PC70BM based-OPVs upon embedding the AgNPs. The external quantum efficiency (EQE) was significantly enhanced by the absorption enhancement due to the plasmonic scattering effect. Finally, we verified the origin of the size-dependent plasmonic forwarding scattering effect of the AgNPs by visualizing the scattering field with near-field Optical microscopy (NSOM) and through analytic Optical simulations.