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Recently Published Articles

  1. Liquid-Crystalline Squaraine Dyes with Anisotropic Absorption of Near Infrared Light

    Bartolome Soberats, Ulrich Mayerhöffer and Frank Würthner

    Version of Record online: 27 MAY 2016 | DOI: 10.1002/adom.201600257

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    A novel squaraine dye constitutes an unusual nematic mesogen absorbing in the near infrared region. Aligned thin films of the squaraine material are produced by mechanical shearing of the liquid-crystalline phase and feature remarkable anisotropic absorption of linearly polarized light in the spectral region between 600 and 1000 nm.

  2. Lasing and Macroscopic Coherence of Hybridized Modes in Coupled 2D Waveguide-VCSEL Resonators

    Andreas Mischok, Tim Wagner, Robert Brückner, Markas Sudzius, Hartmut Fröb, Vadim G. Lyssenko and Karl Leo

    Version of Record online: 27 MAY 2016 | DOI: 10.1002/adom.201600282

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    Microlasers are typically realized utilizing either highly reflective mirrors or total internal reflection of selected modes in an optical waveguide. Such waveguided modes are coherently coupled to the surface emission of a full vertical cavity surface emitting laser (VCSEL) stack via a high-order periodic modulation of the cavity, leading to the observation of hybridized lasing modes with a macroscopically enhanced in-plane coherence length.

  3. Second-Harmonic Generation from ZnO/Al2O3 Nanolaminate Optical Metamaterials Grown by Atomic-Layer Deposition

    Andreas Wickberg, Clemens Kieninger, Christoph Sürgers, Sabine Schlabach, Xiaoke Mu, Christian Koos and Martin Wegener

    Version of Record online: 24 MAY 2016 | DOI: 10.1002/adom.201600200

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    Nanolaminates composed of alternating layers of ZnO and Al2O3 are grown by conformal atomic-layer deposition. Their structural and nonlinear optical properties are correlated. Optimized nano­laminates exhibit an effective bulk second-order nonlinear optical susceptibility that is independent of the substrate and that is five times larger than that of potassium dihydrogen phosphate.

  4. Localized Surface Plasmon-Enhanced Ultrathin Film Broadband Nanoporous Absorbers

    Jin You Lu, Sang Hoon Nam, Kyle Wilke, Aikifa Raza, Yoonkyung E. Lee, Amal AlGhaferi, Nicholas X. Fang and TieJun Zhang

    Version of Record online: 24 MAY 2016 | DOI: 10.1002/adom.201600078

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    A plasmonic ultrathin film broadband nanoporous absorber is realized by combining an ultrathin film solar absorber with localized surface plasmon resonances. The proposed concept is demonstrated by patterning nanopore structures into bilayer/trilayer ultrathin films. The enhanced light absorption is achieved through both the increased optical path length in the ultrathin film and the concentrated incident light field near the nanopore entrance.

  5. All-Optical Fine-Tuning of Absorption Band of Diarylethene with Photochromic Acid-Generating Spiropyran

    Sara Kusumoto, Tetsuya Nakagawa and Yasushi Yokoyama

    Version of Record online: 23 MAY 2016 | DOI: 10.1002/adom.201600228

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    By taking advantage of pKa difference for the isomers of a spiropyran (MC and SP), a continuous and reversible shift of the absorption band of the closed form of diarylethene (C) for 30 nm is successfully realized only by light irradiation and thermal treatment, i.e., without the addition of any chemical species or the application of any physical contact.

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