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Microsphere-chain waveguides: Focusing and transport properties

机译：微球链波导：聚焦和传输特性

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摘要

It is shown that the focusing properties of polystyrene microsphere-chain waveguides (MCWs) formed by sufficiently large spheres (D ≥ 20λ, where D is the sphere diameter and λ is the wavelength of light) scale with the sphere diameter as predicted by geometrical optics. However, this scaling behavior does not hold for mesoscale MCWs with D ≤ 10λ resulting in a periodical focusing with gradually reducing beam waists and in extremely small propagation losses. The observed effects are related to properties of nanojet-induced and periodically focused modes in such structures. The results can be used for developing focusing microprobes, laser scalpels, and polarization filters.
机译：结果表明，由足够大的球体（D≥20λ，其中D是球体直径，λ是光的波长）形成的聚苯乙烯微球链波导（MCW）的聚焦特性与几何光学预测的球体直径成比例。但是，这种缩放行为不适用于D≤10λ的中尺度MCW，从而导致周期性聚焦，并逐渐减小束腰，并且传播损耗极小。观察到的效果与这种结构中纳米喷射诱导的和周期性聚焦的模式的性质有关。该结果可用于开发聚焦微探针，激光手术刀和偏振滤光镜。

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  • 来源
    《Applied Physics Letters》 |2014年第2期|021112.1-021112.4|共4页
  • 作者

    Kenneth W. Allen; Arash Darafsheh; Farzaneh Abolmaali; Neda Mojaverian; Nicholaos I. Limberopoulos; Anatole Lupu; Vasily N. Astratov;

  • 作者单位

    Department of Physics and Optical Science, Center for Optoelectronics and Optical Communications, University of North Carolina at Charlotte, Charlotte, North Carolina 28223-0001, USA,Air Force Research Laboratory, Sensors Directorate, Wright Patterson AFB, Ohio 45433, USA;

    Department of Physics and Optical Science, Center for Optoelectronics and Optical Communications, University of North Carolina at Charlotte, Charlotte, North Carolina 28223-0001, USA,Department of Radiation Oncology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA;

    Department of Physics and Optical Science, Center for Optoelectronics and Optical Communications, University of North Carolina at Charlotte, Charlotte, North Carolina 28223-0001, USA;

    Air Force Research Laboratory, Sensors Directorate, Wright Patterson AFB, Ohio 45433, USA;

    Air Force Research Laboratory, Sensors Directorate, Wright Patterson AFB, Ohio 45433, USA;

    Institut d'Electronique Fondamentale, UMR 8622 CNRS, Universit'e Paris-Sud Ⅺ, 91405 Orsay, France;

    Department of Physics and Optical Science, Center for Optoelectronics and Optical Communications, University of North Carolina at Charlotte, Charlotte, North Carolina 28223-0001, USA,Air Force Research Laboratory, Sensors Directorate, Wright Patterson AFB, Ohio 45433, USA;

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