Advanced Optical Materials

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Recently Published Articles

  1. Whispering Gallery Mode Laser Based on a Self-Assembled Organic Octahedron Microcrystal Microresonator

    Zhenzhen Xu, Qing Liao, Xuedong Wang and Hongbing Fu

    Article first published online: 15 SEP 2014 | DOI: 10.1002/adom.201400299

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    The six lateral faces of octahedron microcrystals (OhMCs) self-assemble from 1,4-dimethoxy-2,5-di[4′-dimethylamino-styryl]benzene (DASB), constituting a high-quality whispering gallery mode cavity. The optimized energy level of H-aggregates and the high-quality radial cavity of the OhMC leads to a lasing threshold as low as 6.9 μJ/cm2. More­over, single-mode lasing is observed from OhMCs with small volumes, making them attractive for practical application in on-chip laser spectroscopy.

  2. Multilayer Graphene:Polycrystalline ITO for Ultralow-Power Active Control of Polarization-Insensitive, Metamaterial-Induced Transparency

    Cuicui Lu, Xiaoyong Hu, Fan Zhang, Hong Yang and Qihuang Gong

    Article first published online: 15 SEP 2014 | DOI: 10.1002/adom.201400319

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    An ultralow power polarization-insensitive metamaterial-induced transparency with ultrafast all-optical control is realized by adopting gold nanoprism trimers as the meta-molecules and using multilayer graphene microsheet/polycrystalline indium-tin oxide composite as the nonlinear medium. Compared with previous reports, the threshold pump intensity is reduced by six orders of magnitude, while an ultrafast response time of picoseconds order is maintained.

  3. Silk Foam Terahertz Waveguides

    Hichem Guerboukha, Guofeng Yan, Olga Skorobogata and Maksim Skorobogatiy

    Article first published online: 11 SEP 2014 | DOI: 10.1002/adom.201400228

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    Silk foams and silk foam-based terahertz waveguides are fabricated using lyophilisation and casting techniques. The samples are then characterized in the THz region using terahertz time domain spectroscopy. This work is motivated by the lack of biocompatible and biofriendly waveguides for low-loss, low-dispersion guidance of THz waves for applications in remote and stand-off sensing in biomedical and agro-alimentary industries.

  4. Photo-patterning of Highly Efficient State-of-the-Art Phosphorescent OLEDs Using Orthogonal Hydrofluoroethers

    Simonas Krotkus, Fabian Ventsch, Daniel Kasemann, Alexander A. Zakhidov, Simone Hofmann, Karl Leo and Malte C. Gather

    Article first published online: 10 SEP 2014 | DOI: 10.1002/adom.201400181

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    Photolithography offers a scalable solution for large area pixel patterning of organic light-emitting diode (OLED) displays. It has been limited due to the incompatibility of traditional processing steps with the majority of organic materials. In this work, photolithographic structuring of state-of-the-art phosphorescent red p-i-n OLEDs is demonstrated using fluorinated polymers in combination with hydrofluoroether solvents. This is the first report on photolithographically patterned OLEDs with state-of-the-art efficiency and good long-term stability.

  5. Resistive Switching-based Electro-Optical Modulation

    Enes Battal, Ayse Ozcan and Ali Kemal Okyay

    Article first published online: 8 SEP 2014 | DOI: 10.1002/adom.201400209

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    Resistive switching enables optical modulation via atomic scale modifications that induce change in the refractive index of active device materials. The formation of filaments and migration of atoms around these filaments between high resistance and low resistance states results in the modulation of the free carrier concentration and, hence, the optical constants of the material.

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