Advanced Optical Materials

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Recently Published Articles

  1. Free-Standing, Single-Crystalline Parallelogram Sb Shallow-Doped ZnO Wave-Guided Optical Resonators

    Yang Liu, Hongxing Dong, Jian Lu, Jingxin Zhan, Jingzhou Li, Zhanghai Chen and Long Zhang

    Article first published online: 19 AUG 2014 | DOI: 10.1002/adom.201400269

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    Sb shallow-doped ZnO microwire wave-guided microcavities are synthesized. The photoluminescence properties and UV lasing of such ZnO microcavities with Sb elements annealed in different atmo­spheres are investigated through low-temperature spectrum detection technology. The ZnO microcavities provide a promising test-bed for investigating new optical modulation behaviour, cavity physics, and for novel photoelectronic devices.

  2. Photovoltaic Mode Ultraviolet Organic Photodetectors with High On/Off Ratio and Fast Response

    Hugh L. Zhu, Wallace C. H. Choy, Wei E. I. Sha and Xingang Ren

    Article first published online: 13 AUG 2014 | DOI: 10.1002/adom.201400227

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    A new approach to light-induced tuning of extraction and injection barrier heights as well as the series resistance is realized by introducing TiO2 nanocrystals as the electron-extraction layer of organic photodetectors. TiO2-based UV photodetectors at the photovoltaic mode achieve a ultrahigh on/off ratio of 105, which is the best value for UV organic photodetectors.

  3. Polariton-Induced Enhanced Emission from an Organic Dye under the Strong Coupling Regime

    Dario Ballarini, Milena De Giorgi, Salvatore Gambino, Giovanni Lerario, Marco Mazzeo, Armando Genco, Gianluca Accorsi, Carlo Giansante, Silvia Colella, Stefania D'Agostino, Paolo Cazzato, Daniele Sanvitto and Giuseppe Gigli

    Article first published online: 8 AUG 2014 | DOI: 10.1002/adom.201400226

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    Exciton–polaritons are quasi-particles with the capability to undergo phase transition into a coherent hybrid state of light and matter. Polaritons in organic microcavities have attracted increasing attention for their characteristic of reaching condensation at room temperature. The new relaxation channels observed under the strong coupling regime could allow a significant enhancement of the photo­luminescence intensity as compared to the bare dye.

  4. Highly Efficient and Stable Phosphorescent Organic Light-Emitting Diodes Utilizing Reverse Intersystem Crossing of the Host Material

    Hirohiko Fukagawa, Takahisa Shimizu, Taisuke Kamada, Yukihiro Kiribayashi, Yoshichika Osada, Munehiro Hasegawa, Katsuyuki Morii and Toshihiro Yamamoto

    Article first published online: 4 AUG 2014 | DOI: 10.1002/adom.201400242

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    An efficient and stable green phosphorescent light-emitting diode (PHOLED) is demonstrated by employing a suitable host. The transient photoluminescence characteristics show that the triplet excitons of the host are rapidly transferred to the dopant and emit phosphorescence in the stable PHOLED. Most of the triplet excitons of the host are transferred to the dopant within 10 ns following the Förster process via a singlet excited state of the host.

  5. Large-Area Antenna-Assisted SEIRA Substrates by Laser Interference Lithography

    Shahin Bagheri, Harald Giessen and Frank Neubrech

    Article first published online: 31 JUL 2014 | DOI: 10.1002/adom.201400218

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    Laser interference lithography is utilized to fabricate large-area plasmonic antenna substrates with tunable plasmonic resonances in the near- and mid-infrared spectral range for surface-enhanced infrared absorption (SEIRA). The broad applicability of such SEIRA substrates is demonstrated by enhancing the infrared vibrational signals of a monolayer octadecanethiol and by monitoring the ultraviolet degradation of a polymer via the decrease of its specific vibrational modes.