Advanced Optical Materials

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Recently Published Articles

  1. Anomalous Terahertz Reflection and Scattering by Flexible and Conformal Coding Metamaterials

    Lanju Liang, Meiqing Qi, Jing Yang, Xiaopeng Shen, Jiquan Zhai, Weizong Xu, Biaobing Jin, Weiwei Liu, Yijun Feng, Caihong Zhang, Hai Lu, Hou-Tong Chen, Lin Kang, Weiwei Xu, Jian Chen, Tie Jun Cui, Peiheng Wu and Shenggang Liu

    Article first published online: 30 JUN 2015 | DOI: 10.1002/adom.201500206

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    The manipulation of terahertz (THz) waves is implemented by 1-bit THz coding metamaterials. The reflection and scattering wave can be controlled by varying the coding sequence. Using this methodology, a wideband and polarization-independent THz thin-film metamaterial with extremely low specular reflection and scattering waves is demonstrated successfully. This metamaterial is also flexible and conformal to the curved surface, which offers widespread applications.

  2. The Tunable White-Light and Multicolor Emission in An Electrodeposited Thin Film of Mixed Lanthanide Coordination Polymers

    Huiping Liu, Tianshu Chu, Zilong Rao, Shuoyu Wang, Yangyi Yang and Wing-Tak Wong

    Article first published online: 30 JUN 2015 | DOI: 10.1002/adom.201500203

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    A white-light-emitting lanthanide coordination polymer thin film is fabricated for the first time by electrodeposition based on a novel hexanuclear lanthanide cluster, in which, Tb3+ generates green emission and enhances the Eu3+-centered red emission through energy transfer process; the ligand generates blue emission. Notably, white-light emission with CIE coordinates of (0.33, 0.34) is obtained by balancing Tb3+/Eu3+ ratio and excitation wavelength.

  3. Gate Tuning of High-Performance InSe-Based Photodetectors Using Graphene Electrodes

    Wengang Luo, Yufei Cao, Pingan Hu, Kaiming Cai, Qi Feng, Faguang Yan, Tengfei Yan, Xinhui Zhang and Kaiyou Wang

    Article first published online: 29 JUN 2015 | DOI: 10.1002/adom.201500190

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    By using graphene as the transparent electrodes to modify the difference of the work function between the electrodes and the InSe, the response time of an InSe-based photo­detector can be down to 120 μs. It can also be tuned by the back-gate voltage from 310 μs down to 100 μs. Simultaneously, the photoresponsivity can reach as high as 60 A W−1.

  4. Anisotropic Light Transport in White Beetle Scales

    Lorenzo Cortese, Lorenzo Pattelli, Francesco Utel, Silvia Vignolini, Matteo Burresi and Diederik S. Wiersma

    Article first published online: 24 JUN 2015 | DOI: 10.1002/adom.201500173

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    The extremely brilliant whiteness shown by the Cyphochilus beetle is generated by multiple scattering of light inside the ultrathin scales that cover its body, whose interior is characterized by an anisotropic nanostructured network of chitin filaments. It is demonstrated that the structural anisotropy of the network is crucial in order to achieve high broadband reflectance from such a thin, low-refractive-index system.

  5. A Flexible Nanocrystal Photovoltaic Ultraviolet Photodetector on a Plant Membrane

    Jingda Wu and Lih Y. Lin

    Article first published online: 23 JUN 2015 | DOI: 10.1002/adom.201500198

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    A flexible UV photodetector is created with a reed membrane as the interspacing layer embedded with ZnO nanocrystals. The membrane's porous nature facilitates the adhesion of active materials and light scattering, and improves device performance. A sandwich structure with a vertical Schottky junction is applied to increase the device's response speed, achieving a sub-second response time, as well as a maximum external quantum efficiency of over 3%. The device also shows a slight performance increase under bending.

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