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Transmission enhancement in loss-gain multilayers by resonant suppression of reflection

机译:通过共振抑制反射来增强损耗增益多层中的透射率

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摘要

Using the transfer-matrix approach and solving time-domain differential equations, we analyze the loss compensation mechanism in multilayer systems composed of an absorbing transparent conductive oxide and dielectric doped with an active material. We reveal also another regime with the possibility of enhanced transmission with suppressed reflection originating from the resonant properties of the multilayers. For obliquely incident and evanescent waves, such enhanced transmission under suppressed reflection turns into the reflectionless regime, which is similar to that observed in the PT-symmetric structures, but does not require PT symmetry. We infer that the reflectionless transmission is due to the full loss compensation at the resonant wavelengths of the multilayers.
机译:使用转移矩阵方法并求解时域微分方程,我们分析了由吸收性透明导电氧化物和掺杂有活性材料的电介质组成的多层系统的损耗补偿机制。我们还揭示了另一种方案,该方案可能具有增强的透射率,并且由于多层的共振特性而产生的抑制反射也得以实现。对于倾斜入射波和e逝波,这种在抑制反射下增强的透射率变成了无反射状态,这与在PT对称结构中观察到的情况相似,但不需要PT对称。我们推断无反射透射是由于多层的共振波长处的全损耗补偿所致。

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  • 来源
    《Physical review》 |2017年第23期|235129.1-235129.10|共10页
  • 作者单位

    B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68 Nezavisimosti Avenue, Minsk 220072, Belarus ,ITMO University, 49 Kronverksky Pr., St. Petersburg 197101, Russia;

    International Center of Future Science, State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering,Jilin University, 2699 Qianjin Str., Changchun 130012, China ,Institute of Radio Astronomy of National Academy of Sciences of Ukraine, 4 Mystetstv Street, Kharkiv 61002, Ukraine;

    Institute of Radio Astronomy of National Academy of Sciences of Ukraine, 4 Mystetstv Street, Kharkiv 61002, Ukraine ,School of Radio Physics, V.N. Karazin Kharkiv National University, 4 Svobody sq., Kharkiv 61022, Ukraine;

    DTU Fotonik, Technical University of Denmark, Orsteds Plads 343, DK-2800 Kongens Lyngby, Denmark;

    DTU Fotonik, Technical University of Denmark, Orsteds Plads 343, DK-2800 Kongens Lyngby, Denmark ,Department of Theoretical Physics and Astrophysics, Belarusian State University, 4 Nezavisimosti Avenue, Minsk 220030, Belarus;

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