Wide bandwidth slow light waveguide in a manipulated 2D photonic crystal

IF 2.2 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Journal of Computational Electronics Pub Date : 2023-12-06 DOI:10.1007/s10825-023-02118-5

S. Bahareh Seyedein Ardebili, Behnam Zeinalvand Farzin, Jong Su Kim

引用次数: 0

Abstract

The bandwidth limitation of slow light may distort optical pulses, potentially affecting their practical application. Therefore, researching structures capable of overcoming this limitation could represent a valuable step forward. This theoretical work explores a 2D photonic crystal waveguide with high bandwidth. The optimized structure, comprised of Ge cylinders in an air background, is designed to be arranged in square lattices containing a line defect. The line defect consists of a series of half-cylinders, with their centers aligned with neighboring cylinders at half the lattice constant. This defect generates a waveguide mode that propagates along the line. Additionally, the group index and bandwidth of the mode were studied and optimized for different radii of the photonic crystal. With this relatively simple structure and the selection of appropriate geometric sizes, high bandwidth and a group-index-bandwidth-product of up to one could be achieved.

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受控二维光子晶体中的宽带慢速光波导

慢光的带宽限制可能会扭曲光脉冲，从而影响其实际应用。因此，研究能够克服这一限制的结构将是向前迈出的宝贵一步。这项理论研究探索了一种具有高带宽的二维光子晶体波导。优化后的结构由空气背景中的 Ge 圆柱组成，设计成包含线缺陷的正方形晶格。线缺陷由一系列半圆柱体组成，它们的中心与相邻圆柱体对齐，中心距为晶格常数的一半。这种缺陷会产生沿线传播的波导模式。此外，还对该模式的群指数和带宽进行了研究，并针对光子晶体的不同半径进行了优化。通过这种相对简单的结构和选择适当的几何尺寸，可以实现高带宽和高达 1 的群指数带宽乘积。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Computational Electronics ENGINEERING, ELECTRICAL & ELECTRONIC-PHYSICS, APPLIED

CiteScore

4.50

自引率

4.80%

发文量

142

审稿时长

>12 weeks

期刊介绍： he Journal of Computational Electronics brings together research on all aspects of modeling and simulation of modern electronics. This includes optical, electronic, mechanical, and quantum mechanical aspects, as well as research on the underlying mathematical algorithms and computational details. The related areas of energy conversion/storage and of molecular and biological systems, in which the thrust is on the charge transport, electronic, mechanical, and optical properties, are also covered. In particular, we encourage manuscripts dealing with device simulation; with optical and optoelectronic systems and photonics; with energy storage (e.g. batteries, fuel cells) and harvesting (e.g. photovoltaic), with simulation of circuits, VLSI layout, logic and architecture (based on, for example, CMOS devices, quantum-cellular automata, QBITs, or single-electron transistors); with electromagnetic simulations (such as microwave electronics and components); or with molecular and biological systems. However, in all these cases, the submitted manuscripts should explicitly address the electronic properties of the relevant systems, materials, or devices and/or present novel contributions to the physical models, computational strategies, or numerical algorithms.