Transmission filter controlled by incident conditions in single-layer waveguide grating structures

Fan Lina; Jia Kehui; Ma Junshan

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Transmission filter controlled by incident conditions in single-layer waveguide grating structures

机译：通过入射条件在单层波导光栅结构中控制的透射滤波器

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The classical single-layer waveguide grating structure is often designed as a reflection filter under 0 degrees azimuthal angle conditions. A new method for achieving a transmission filter by modulating incident conditions is proposed rather than adjusting structural parameters. A 90 degrees azimuthal angle ensures single resonance peaks, and large incident angles provide a low-transmittance background. When the proposed single-layer waveguide grating structure is irradiated with an incident light azimuthal angle of 90 degrees and incident angle of 86 degrees, numerical results show that a high transmission peak emerges at 1550 nm with linewidth Delta lambda = 7.2 nm. Moreover, the transmission peak has nearly 100% transmittance. These findings show that modulating the incident conditions is also an effective means apart from optimizing the structural parameters. The classical reflection filter can be reversed into a transmission filter using this method. (C) 2019 Optical Society of America

机译：经典单层波导光栅结构通常设计为0度方形角条件下的反射滤波器。提出了一种通过调制入射条件来实现传输滤波器的新方法，而不是调整结构参数。 90度方位角确保单个共振峰值，并且大的入射角提供低透射率背景。当用入射光方位角90度的入射光方形角照射所提出的单层波导光栅结构时，数值结果表明，高透射峰在1550nm中出现，具有线宽Delta Lambda = 7.2nm。此外，传输峰具有近100％的透射率。这些发现表明，除了优化结构参数之外，调制事件条件也是一种有效的手段。可以使用此方法将经典反射滤波器反转到透射滤波器中。（c）2019年光学学会

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来源
《Applied optics》 |2019年第31期|共5页
作者
Fan Lina; Jia Kehui; Ma Junshan;
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作者单位

Univ Shanghai Sci &

Technol Sch Opt Elect &

Comp Engn 516 Jungong Rd Shanghai 200093 Peoples R China;

Suzhou Vocat Univ Sch Elect &

Informat Engn Suzhou 215104 Jiangsu Peoples R China;

Univ Shanghai Sci &

Technol Sch Opt Elect &

Comp Engn 516 Jungong Rd Shanghai 200093 Peoples R China;

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Transmission filter controlled by incident conditions in single-layer waveguide grating structures

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