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  1. Direct Writing of Flexible Barium Titanate/Polydimethylsiloxane 3D Photonic Crystals with Mechanically Tunable Terahertz Properties

    Pengfei Zhu, Weiyi Yang, Rong Wang, Shuang Gao, Bo Li and Qi Li

    Version of Record online: 24 FEB 2017 | DOI: 10.1002/adom.201600977

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    Mechanically flexible 3D terahertz photonic crystals are created by direct-writing technology with a composite ink system composed of polydimethylsiloxane and barium titanate nanoparticles, which demonstrate a unique tunable terahertz property under external force field. Their terahertz property is responsive to external force fields reversibly, which can find novel applications in terahertz technology and other relative technological applications.

  2. Probing Local Potentials inside Metallic Nanopores with SERS and Bipolar Electrochemistry

    Yi Li, Chang Chen, Kherim Willems, Sarp Kerman, Liesbet Lagae, Guido Groeseneken, Tim Stakenborg and Pol Van Dorpe

    Version of Record online: 24 FEB 2017 | DOI: 10.1002/adom.201600907

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    An approach to monitor the local potential is demonstrated using bipolar electrochemical surface-enhanced Raman spectroscopy (SERS). The redox SERS changes of Nile Blue A on two types of gold nanopores are found to be reversed, which is confirmed by numerical simulations. The driving voltage of metallic nanopores is about an order of magnitude lower than that of microfluidic bipolar devices.

  3. Influence of Silver Film Quality on the Threshold of Plasmonic Nanowire Lasers

    Haichao Yu, Themistoklis P. H. Sidiropoulos, Wei Liu, Carsten Ronning, Peter K. Petrov, Sang-Hyun Oh, Stefan A. Maier, Peng Jin and Rupert F. Oulton

    Version of Record online: 23 FEB 2017 | DOI: 10.1002/adom.201600856

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    The role of deposition rateand substrate temperature on silver film growth process for improving the performance of hybrid plasmonic nanowire lasers is studied. High substrate temperatures and high deposition rates allow near-epitaxial silver growth on mica. This work increases the fundamental understanding of metal film growth and gives new insights into the fundamental loss processes of metal-based nanowire lasers.

  4. Optical Activity of Chiral Nanoscrolls

    Anvar S. Baimuratov, Yurii K. Gun'ko, Alexey G. Shalkovskiy, Alexander V. Baranov, Anatoly V. Fedorov and Ivan D. Rukhlenko

    Version of Record online: 21 FEB 2017 | DOI: 10.1002/adom.201600982

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    A simple analytical theory of the optical activity of chiral nanoscrolls is presented. The theory provides expressions for the rotatory strengths upon interband and intraband optical transitions inside semiconductor nanoscrolls, which can be useful for modeling and interpretation of chiroptical responses of nanoscroll ensembles fabricated by ultrasound exfoliation of semiconductor materials in the presence of chiral ligands.

  5. An Innovative Postdeposition Annealing Approach Producing Centimeter-Scale In2O3/In2(TeO3)3 Bulk Heterojunction Thin Film for Room-Temperature Persistent Photoconductivity

    Jiandong Yao, Zhaoqiang Zheng and Guowei Yang

    Version of Record online: 20 FEB 2017 | DOI: 10.1002/adom.201600908

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    A centimeter-scale In2O3/In2(TeO3)3 bulk heterojunction thin films is achieved via an initial pulsed-laser deposition followed by a postdeposition annealing. A prototype optoelectronic device is fabricated and it exhibits pronounced persistent photoconductivity from ultraviolet to red. In addition, flexibility is demonstrated by exploiting a mica substrate, which demonstrates potential for wearable devices and provides tunable and extended focus ranges for photoexcitation.