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Recently Published Articles

  1. SERS-Enabled Lab-on-a-Chip Systems

    Jian-An Huang, Yong-Lai Zhang, Hong Ding and Hong-Bo Sun

    Article first published online: 23 JAN 2015 | DOI: 10.1002/adom.201400534

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    With the rapid progress in microfluidics and optofluidics, surface enhanced Raman spectroscopy (SERS) has been successfully combined with Lab-on-a-Chip (LoC) systems for sensitive optofluidic dectection. In this review, the recent advances of SERS and microfluidics for the development of reliable multifunctional SERS-enabled LoC systems and their broad chemical/biological applications is summarized.

  2. Diketopyrrolopyrroles: Synthesis, Reactivity, and Optical Properties

    Marek Grzybowski and Daniel T. Gryko

    Article first published online: 23 JAN 2015 | DOI: 10.1002/adom.201400559

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    New, important organic compounds are often discovered by happenstance. In this review, the chemistry of diketopyrrolopyrroles and the reasons why these high-quality pigments became the work-horse of organic photonics and electronics is comprehensively described. A critical overview of the optical properties of a variety of diketopyrrolopyrroles and their π-expanded analogues is also provided.

  3. Nonlinear Optical Properties and Temperature-Dependent UV–Vis Absorption and Photoluminescence Emission in 2D Hexagonal Boron Nitride Nanosheets

    Pathik Kumbhakar, Arup Kanti Kole, Chandra Sekhar Tiwary, Subrata Biswas, Soumya Vinod, Jaime Taha-Tijerina, Udit Chatterjee and Pulickel M. Ajayan

    Article first published online: 22 JAN 2015 | DOI: 10.1002/adom.201400445

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    Nonlinear optical properties of hexagonal boron nitride nanosheets (h-BNNS) with a large two-photon absorption cross section of ≈570 000 GM are reported at 1064 nm wavelength, for the first time. The dEg/dT of 5.9 meV K−1 and the temperature-dependent linear defect-induced photoluminescence emission in UV region in BNNS is reported. The present work may open up new applications of h-BNNS in biophotonic devices.

  4. Terahertz Metamaterials with Ultrahigh Angular Sensitivity

    Norman Born, Ibraheem Al-Naib, Christian Jansen, Ranjan Singh, Jerome V. Moloney, Maik Scheller and Martin Koch

    Article first published online: 21 JAN 2015 | DOI: 10.1002/adom.201400469

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    A novel conceptual design methodology for strongly interacting metamaterials allows an ultrahigh angular sensitivity. Among others, this methodology enables precise sensing of the wave vector or the exclusion of unwanted directional radiation components. By diligently tailoring the dimensions of the primitive unit cell, an orders of magnitude enhanced sensitivity is achieved.

  5. Angular Photothermal Depletion of Randomly Oriented Gold Nanorods for Polarization-Controlled Multilayered Optical Storage

    Adam B. Taylor and James W. M. Chon

    Article first published online: 21 JAN 2015 | DOI: 10.1002/adom.201400294

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    The polarization response of surface plasmon resonance in aligned gold nanorods is used as a way to control the optical extinction imposed by the nanorods in a multilayer setting. This can be applied to high-density multilayered optical storage, where heavy beam extinction in each layer is the inhibiting factor to stacking more layers.