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  1. Ultrafast Laser-Induced Metasurfaces for Geometric Phase Manipulation

    Rokas Drevinskas, Martynas Beresna, Jingyu Zhang, Andrey G. Kazanskii and Peter G. Kazansky

    Version of Record online: 7 DEC 2016 | DOI: 10.1002/adom.201600575

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    Direct-write femtosecond laser nanostructuring of 300 nanometer thick a-Si:H films results in space-variant functional metasurfaces with form birefringence of up to Δn ≈ –0.5. Engineering the orientation of local optical axis allows implementing continuous phase profiles of nearly any optical element including arrays of polarization microconverters and microlenses, polarization gratings, and computer-generated holograms with continuous phase gradients of ≈1 rad µm−1.

  2. Controllable Propulsion by Light: Steering a Solar Sail via Tunable Radiation Pressure

    Dakang Ma, Joseph Murray and Jeremy N. Munday

    Version of Record online: 7 DEC 2016 | DOI: 10.1002/adom.201600668

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    Switchable reflectivity enables tunable radiation pressure for spacecraft propulsion through the transfer of photon momentum. Solar sails offer a propellant-free alternative for deep space travel; however, they are limited in maneuverability. This new electrically controllable device enables a solar sail to be steered by changing the photon pressure at different parts of the sail.

  3. Inorganic Lead Halide Perovskite Single Crystals: Phase-Selective Low-Temperature Growth, Carrier Transport Properties, and Self-Powered Photodetection

    Makhsud I. Saidaminov, Md Azimul Haque, Jawaher Almutlaq, Smritakshi Sarmah, Xiao-He Miao, Raihana Begum, Ayan A. Zhumekenov, Ibrahim Dursun, Namchul Cho, Banavoth Murali, Omar F. Mohammed, Tom Wu and Osman M. Bakr

    Version of Record online: 6 DEC 2016 | DOI: 10.1002/adom.201600704

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    A rapid, low-temperature, and solution-based route is developed for growing large-sized cesium lead halide perovskite single crystals under ambient conditions. An ultralow minority carrier concentration was measured in CsPbBr3 (≈108 holes per cm3, much lower than in any other lead halide perovskite and crystalline silicon), which enables to realize self-powered photodetectors with a high ON/OFF ratio (105).

  4. Considerations for Upscaling of Organohalide Perovskite Solar Cells

    Qianqian Lin, Ravi Chandra Raju Nagiri, Paul L. Burn and Paul Meredith

    Version of Record online: 30 NOV 2016 | DOI: 10.1002/adom.201600819

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    Upscaling of organohalide lead perovskite solar cells is now required for successful manufacturing and commercialization. High-efficiency large area (2.0 cm2) devices are achieved based on a predictive methodology incorporating the optoelectronic design of highly transparent and conductive electrodes, and controlled uniformity of the organohalide perovskite junction.

  5. Extreme Refractive Index Wing Scale Beads Containing Dense Pterin Pigments Cause the Bright Colors of Pierid Butterflies

    Bodo D. Wilts, Bas Wijnen, Hein L. Leertouwer, Ullrich Steiner and Doekele G. Stavenga

    Version of Record online: 28 NOV 2016 | DOI: 10.1002/adom.201600879

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    In the common pierid butterflies, the coloration arises from the interplay of absorption and scattering of light by pigment-loaded granules in their wing scales. The study shows that the bead's shape is optimized for light scattering and that the complex refractive index of these pigmented granules, with values above 2 in the visible wavelength range, is unusually high for biological materials.

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