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An all-optical 1× 2 Demultiplexer Using Kerr Nonlinear Nano-plasmonic Switches
Plasmonics ( IF 3 ) Pub Date : 2019-11-14 , DOI: 10.1007/s11468-019-01068-8
Sajjad Bashiri , Kiazand Fasihi

In this paper, a novel surface plasmon polariton (SPP) based all-optical 1× 2 demultiplexer, which is based on a modified Y-branch structure and a controllable switching module, is presented. In the modified Y-branch structure, which acts as an ideal wide-band splitter, the width of the branches are chosen as one half the input waveguide. The switching module is constructed using two nano-plasmonic racetrack-shaped disk resonators which are side coupled to the branches of the Y-branch structure. It has been shown that using a pump light power, the transmissions of the input signal into the output ports can be controlled. The simulation results are based on the two dimensional finite-difference time-domain (2D FDTD) method. In the proposed device, the “on” state transmission coefficients and the extinction ratios (measured at the output ports), for the pump light source with the wavelength of 660 nm and the intensity of 1.75 MW/cm2, are about 0.74 and 28.75 dB, respectively. Furthermore, in this case, the switching times of the proposed device, measured at the port 1 and port 2, are about 100 fs and 180 fs, respectively. It is expected that the proposed device can find applications in all-optical signal processing.

中文翻译:

使用Kerr非线性纳米等离子体开关的全光1×2解复用器

本文提出了一种新型的基于表面等离子体激元极化(SPP)的全光学1×2解复用器,它基于改进的Y分支结构和可控开关模块。在改进的Y分支结构中,它用作理想的宽带分离器,分支的宽度选择为输入波导的一半。开关模块使用两个侧面耦合到Y分支结构分支的纳米等离子体跑道形磁盘谐振器构建。已经表明,使用泵浦光功率,可以控制输入信号到输出端口的传输。仿真结果基于二维有限差分时域(2D FDTD)方法。在建议的设备中,“导通”状态的传输系数和消光比(在输出端口测得)纳米和1.75 MW / cm 2的强度分别约为0.74和28.75  dB。此外,在这种情况下,在端口1和端口2处测量的拟议设备的开关时间分别约为100 fs和180 fs。期望所提出的设备可以在全光信号处理中找到应用。
更新日期:2019-11-14
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