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  1. Light Scattering Enhancement at the Absorption Edge in Dewetting Droplets of Cyanine Dyes

    Nicolas A. Leclaire, Florent Boudoire, Erwin Hack, Rolf Brönnimann, Frank A. Nüesch and Jakob Heier

    Version of Record online: 9 FEB 2017 | DOI: 10.1002/adom.201600903

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    Arrays of sub-micrometer-sized cyanine dye droplets are formed on substrates by a dewetting process. Depending on the droplets' dimensions, scattering follows the behavior of one of three different extinction regimes. The new extinction features originate from the enhancement of light scattering at the absorption edge of the dye, where strong variations of the refractive index occur.

  2. White Afterglow Room-Temperature Emission from an Isolated Single Aromatic Unit under Ambient Condition

    Shuzo Hirata and Martin Vacha

    Version of Record online: 9 FEB 2017 | DOI: 10.1002/adom.201600996

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    White afterglow room-temperature (RT) emission is demonstrated from isolated single aromatic unit in air. Large 2D planer aromatic cyclic structure doped into a rigid matrix allows for a blue-green afterglow thermally activated delayed fluorescence as well as a red afterglow phosphorescence at RT. This results in the white afterglow RT emission with a quantum efficiency of 2.6% and a lifetime of 3.9 s.

  3. Self-Aligned Trapping and Detecting Molecules Using a Plasmonic Tweezer with an Integrated Electrostatic Cell

    Zhongbo Yan, Ming Xia, Pei Zhang and Ya-Hong Xie

    Version of Record online: 9 FEB 2017 | DOI: 10.1002/adom.201600329

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    A self-aligned trapping method of single molecules is demonstrated by combining a plasmonic tweezer and electrostatic force. A unique graphene–Au pyramid platform is employed to induce plasmonic tweezer effect and used for label-free detection of the molecules. This method offers a realistic possibility for precisely positional control of single biomolecules, and allows the study of their properties.

  4. Broadband Wide-Angle Multifunctional Polarization Converter via Liquid-Metal-Based Metasurface

    Pin Chieh Wu, Weiming Zhu, Zhong Xiang Shen, Peter Han Joo Chong, Wee Ser, Din Ping Tsai and Ai-Qun Liu

    Version of Record online: 8 FEB 2017 | DOI: 10.1002/adom.201600938

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    A liquid-metal-based metasurface is demonstrated for broadband wide-angle multifunctional polarization conversion in different polarization states: linear, circular, and elliptical, by dynamically reconfiguring through the tuning of the L-shaped resonators. The bandwidth is >60% and the angular tolerance is 45°. This is a significant milestone for metasurface applications such as smart radar and light manipulation for quantum computing and communication, etc.

  5. Light Trapping in Plasmonic Nanovessels

    Bin Ai, Panpan Gu, Zengyao Wang, Helmuth Möhwald, Limin Wang and Gang Zhang

    Version of Record online: 8 FEB 2017 | DOI: 10.1002/adom.201600980

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    Inverse hollow nanocone array films with minimized substrate effect are designed to make light experience multiple internal reflections in the cavity of the hollow nanocones and strong coupling to the surface plasmon of the nanostructure, leading to strong light trapping and enhanced electric fields confined in the cavity.

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