Tunable Three-Channel Mesoscopic Demultiplexer Based on Detuned Stubs

IF 1.1 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY Physics of Wave Phenomena Pub Date : 2023-08-30 DOI:10.3103/S1541308X23040064
Z. Labdouti, I. Quotane, A. Mouadili, T. Mrabti, E. H. El Boudouti
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Abstract

We study analytically and numerically the possibility of implementing a simple mesoscopic demultiplexer based on bound states in the continuum (BICs), induced transparency, and Fano resonances. The demultiplexer is made of a Y-shaped waveguide with an input line and two output lines where each output line contains two stubs grafted on two different sites in a U-shape far from the input line. The BICs are obtained for specific values of the lengths of the stubs of U-shaped structures and the segment separating them. By detuning the two stubs slightly in an appropriate way, BIC transforms into Fano or electromagnetic induced transparency (EIT) resonances. We give closed-form expressions of the geometrical parameters that allow a selective transfer of the given state in the first waveguide without perturbing the second waveguide. The effect of temperature on the transmission resonances is also examined using Landauer–Buttiker formula.

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基于失谐存根的可调谐三通道介观解复用器
我们分析和数值研究了基于连续体束缚态(bic)、诱导透明和Fano共振实现简单介观解复用器的可能性。解复用器由一个y形波导和一条输入线和两条输出线组成,其中每条输出线包含两个stub,它们以u形连接在远离输入线的两个不同位置上。根据u型结构的桩长和分开它们的段的长度的特定值获得bic。通过以适当的方式使两个存根稍微失谐,BIC转换为Fano或电磁感应透明(EIT)共振。我们给出了几何参数的封闭表达式,该表达式允许在不干扰第二波导的情况下在第一波导中选择性地转移给定状态。利用Landauer-Buttiker公式分析了温度对透射共振的影响。
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来源期刊
Physics of Wave Phenomena
Physics of Wave Phenomena PHYSICS, MULTIDISCIPLINARY-
CiteScore
2.50
自引率
21.40%
发文量
43
审稿时长
>12 weeks
期刊介绍: Physics of Wave Phenomena publishes original contributions in general and nonlinear wave theory, original experimental results in optics, acoustics and radiophysics. The fields of physics represented in this journal include nonlinear optics, acoustics, and radiophysics; nonlinear effects of any nature including nonlinear dynamics and chaos; phase transitions including light- and sound-induced; laser physics; optical and other spectroscopies; new instruments, methods, and measurements of wave and oscillatory processes; remote sensing of waves in natural media; wave interactions in biophysics, econophysics and other cross-disciplinary areas.
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