Strain-Induced Frequency Splitting in PT Symmetric Coupled Silicon Resonators.

IF 3 3区 工程技术 Q2 CHEMISTRY, ANALYTICAL
Micromachines Pub Date : 2024-10-21 DOI:10.3390/mi15101278
Lifeng Wang, Shangyang Zhang, Qunce Yuan
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引用次数: 0

Abstract

When two resonators of coupled silicon resonators are identical and the gain on one side is equal to the loss on the other side, a parity-time (PT) symmetric-coupled silicon resonator is formed. As non-Hermitian systems, the PT-symmetric systems have exhibited many special properties and interesting phenomena. This paper proposes the strain-induced frequency splitting in PT symmetry-coupled silicon resonators. The frequency splitting of the PT system caused by strain perturbations is derived and simulated. Theory and simulation both indicate that the PT system is more sensitive to strain perturbation near the exceptional point (EP) point. Then, a feedback circuit is designed to achieve the negative damping required for PT symmetry. Based on a simple silicon-on-insulator (SOI) process, the silicon resonator chip is successfully fabricated. After that, the PT-symmetric-coupled silicon resonators are successfully constructed, and the frequency splitting phenomenon caused by strain is observed experimentally.

PT 对称耦合硅谐振器中由应变引起的频率分裂
当耦合硅谐振器的两个谐振器完全相同,且一侧的增益等于另一侧的损耗时,就形成了奇偶时(PT)对称耦合硅谐振器。作为非ermitian 系统,PT 对称系统表现出许多特殊性质和有趣现象。本文提出了 PT 对称耦合硅谐振器中的应变诱导分频。推导并模拟了应变扰动引起的 PT 系统频率分裂。理论和仿真都表明,PT 系统对特殊点 (EP) 附近的应变扰动更为敏感。然后,设计了一个反馈电路来实现 PT 对称性所需的负阻尼。基于简单的绝缘体上硅(SOI)工艺,成功制造出了硅谐振器芯片。随后,成功构建了 PT 对称耦合硅谐振器,并在实验中观察到了由应变引起的频率分裂现象。
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来源期刊
Micromachines
Micromachines NANOSCIENCE & NANOTECHNOLOGY-INSTRUMENTS & INSTRUMENTATION
CiteScore
5.20
自引率
14.70%
发文量
1862
审稿时长
16.31 days
期刊介绍: Micromachines (ISSN 2072-666X) is an international, peer-reviewed open access journal which provides an advanced forum for studies related to micro-scaled machines and micromachinery. It publishes reviews, regular research papers and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.
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