{"title":"Slot waveguide-based, polarization-insensitive, thermo-optic phase shifters.","authors":"WenKang Wang, YanFeng Zheng, JiaWang Feng, Rui Cheng","doi":"10.1364/OL.553564","DOIUrl":null,"url":null,"abstract":"<p><p>Polarization-insensitive, thermo-optic (TO), silicon photonic phase shifters using vertical slot waveguides are proposed. For such slot waveguides that support slot modes only for transverse-electric (TE) polarized modes, the TO coefficients of the fundamental TE and transverse-magnetic (TM) polarized modes (i.e., TE<sub>0</sub> and TM<sub>0</sub>, respectively) can be easily engineered to be the same by designing the widths of the slot and the total waveguide. In the experiments, the TO coefficients of the TE<sub>0</sub> and TM<sub>0</sub> modes for various slot waveguides are characterized by measuring the electrical switching powers of dual-polarization MZI optical switches using the slot waveguides as the TO phase shifters. A small switching power difference of <0.3% between the two polarization modes is observed for the switch using the slot waveguide engineered to act as a polarization-insensitive phase shifter. The performance of the developed optical switch is also experimentally characterized to prove the potential of the proposed phase shifters to realize polarization-independent switches.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 5","pages":"1669-1672"},"PeriodicalIF":3.3000,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics letters","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1364/OL.553564","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
Polarization-insensitive, thermo-optic (TO), silicon photonic phase shifters using vertical slot waveguides are proposed. For such slot waveguides that support slot modes only for transverse-electric (TE) polarized modes, the TO coefficients of the fundamental TE and transverse-magnetic (TM) polarized modes (i.e., TE0 and TM0, respectively) can be easily engineered to be the same by designing the widths of the slot and the total waveguide. In the experiments, the TO coefficients of the TE0 and TM0 modes for various slot waveguides are characterized by measuring the electrical switching powers of dual-polarization MZI optical switches using the slot waveguides as the TO phase shifters. A small switching power difference of <0.3% between the two polarization modes is observed for the switch using the slot waveguide engineered to act as a polarization-insensitive phase shifter. The performance of the developed optical switch is also experimentally characterized to prove the potential of the proposed phase shifters to realize polarization-independent switches.
期刊介绍：
The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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