基于GSST的非易失性调制器的设计与分析
Design and Analysis of Nonvolatile GSST-based Modulator Utilizing Engineered Mach-Zehnder Structure with Graphene Heaters
摘要：
光子集成电路（PIC）是片上光学技术的基础。Mach-Zehnder调制器是PIC的有吸引力的构建块，其主要依赖于材料中的弱且易挥发的光学效应。相比之下，相变材料，如GSST是有前途的候选人，以实现高效和非易失性可重构光学器件。然而，相变材料的相变伴随着其折射率虚部的大的变化，这使得MZM的设计具有挑战性。在本文中，两个有趣的设计方法命名为损失平衡和预均衡提出了高性能的GSST基于MZM。在这方面，提出了一种具有石墨烯作为微加热器的基于GSST的波导，其在所介绍的两种方法中起到可配置有源波导的作用。
英文摘要：
Photonic integrated circuits (PICs) are the foundation of on-chip optical technologies. Mach-Zehnder modulators are appealing building blocks of PICs which mostly rely on weak and volatile optical effects in materials. In contrast, phase change materials such as GSST are promising candidates to realize efficient and nonvolatile reconfigurable optical devices. However, the phase transitions of PCMs are accompanied by large changes in the imaginary parts of their refractive indices which make the design of MZMs challenging. In this paper, two interesting design methods named as loss-balancing and pre equalization are introduced to propose high performance GSST based MZMs. In this regard, a GSST based waveguide with graphene as a microheater is proposed which plays the role of configurable active waveguide in both the introduced methods.
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