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首页> 外文期刊>Advanced Functional Materials >Ultracompact Asymmetric Mach-Zehnder Interferometers with High Visibility Constructed from Exciton Polariton Waveguides of Organic Dye Nanofibers
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Ultracompact Asymmetric Mach-Zehnder Interferometers with High Visibility Constructed from Exciton Polariton Waveguides of Organic Dye Nanofibers

机译：由有机染料纳米纤维的激子极化波波导构建的具有超高可见度的超紧凑非对称马赫曾德尔干涉仪

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摘要

Manipulation of light using subwavelength waveguides is a key technology in the development of miniaturized photonic circuits, which possess various advantages over their electronic counterparts. The novel approach presented for such waveguiding involves the propagation of exciton polaritons (EPs), which are quasi-particles formed by strong exciton-photon coupling, along organic dye nanofibers. A self-assembled nanofiber of thiacyanine (TC) with a width of≈200 nm propagates the EPs created by an optical excitation over a submillimeter-scale distance and passes through a bend with a micrometer-scale radius with low bending loss. To demonstrate the remarkable potential of EP-based miniaturized photonic circuits, asymmetric Mach-Zehnder interferometers (AMZIs) are fabricated with TC nanofibers by micromanipulation. The AMZIs with a footprint of≈20 μm × 20 μm exhibit a visibility of nearly unity and function as channel drop filters with the considerably high extinction ratio of up to ≈15 dB. Such high-performance and ultracom pact channel drop filters operating in the visible wavelength region have rarely been developed with other waveguide technologies. The coherent properties of the EPs in the nanofibers are investigated using time-resolved experiments. The coherent properties provide useful information for designing EP-based photonic circuits and for understanding EP dynamics in a nanofiber.
机译：使用亚波长波导操纵光是微型光子电路开发中的关键技术，与电子同类产品相比，它具有各种优势。针对这种波导提出的新颖方法涉及激子极化子（EPs）沿着有机染料纳米纤维的传播，激子极化子是由强激子-光子耦合形成的准粒子。具有约200 nm宽度的硫氰酸（TC）自组装纳米纤维可将由光激发产生的EP传播至亚毫米级的距离，并通过具有微米级半径的弯曲，且弯曲损失小。为了证明基于EP的微型光子电路的巨大潜力，通过微操作用TC纳米纤维制造了非对称Mach-Zehnder干涉仪（AMZIs）。占位面积约为20μm×20μm的AMZI具有近乎统一的可见度，并具有高达≈15dB的极高消光比，可用作通道下降滤波器。这种在可见光波长范围内运行的高性能，超紧凑型通道降滤光器很少与其他波导技术一起开发。使用时间分辨实验研究了纳米纤维中EP的相干特性。相干特性为设计基于EP的光子电路以及了解纳米纤维中的EP动力学提供了有用的信息。

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  • 来源
    《Advanced Functional Materials》 |2013年第7期|839-845|共7页
  • 作者

    Ken Takazawa; Jun-ichi Inoue; Kazutaka Mitsuishi; Takashi Kuroda;

  • 作者单位

    National Institute for Materials Science 3-13 Sakura, Tsukuba 305-0003, Japan;

    National Institute for Materials Science 3-13 Sakura, Tsukuba 305-0003, Japan;

    National Institute for Materials Science 3-13 Sakura, Tsukuba 305-0003, Japan;

    National Institute for Materials Science 3-13 Sakura, Tsukuba 305-0003, Japan;

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