{"title":"法布里-佩罗特耦合纳米腔体的自发对称破缺","authors":"Jianming Mai, Xiansheng Huang, Xu Guo, Haihua Fan, Kok Wai Cheah","doi":"10.1038/s42005-024-01700-y","DOIUrl":null,"url":null,"abstract":"Ring cavities are quickly emerging as preferential platforms to investigate spontaneous symmetry breaking. However, research on handedness polarisation splitting within Kerr-coupled cavities is yet at a preliminary stage. Here, we observe experimentally spontaneous symmetry breaking in a non-Hermitian coupled Fabry‒Pérot nanocavity. In the experiment, horizontally polarised light is incident on the nanocavities, and symmetry breaking occurs when the power exceeds the symmetry breaking threshold of $$8\\,{{\\mbox{mW}}}$$ . We interpret such observation via nonlinear coupled mode theory, finding that an excitation power-dependent random splitting of right- or left-handed circular polarisations (RCP and LCP, respectively) emerges at the resonance peak. Further numerical simulations show that when the incident power is above the symmetry breaking threshold, the device exhibits spontaneous symmetry breaking characteristics: an additional polarisation component appears in the output field when the input field is monopolarised, and this is attributed to the imbalance of RCP and LCP. Our findings provide further understanding of spontaneous symmetry breaking in non-Hermitian systems and demonstrate the potential applications of the proposed device in optical signal processing. Synchronization between self-sustained oscillators is ubiquitous in nature and engineering, and it is generally accepted to occur due to weak interactions between the oscillating objects. The authors challenge this paradigm by presenting a theoretical higher-order phase model for non-weak coupling validated through experiments.","PeriodicalId":10540,"journal":{"name":"Communications Physics","volume":null,"pages":null},"PeriodicalIF":5.4000,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s42005-024-01700-y.pdf","citationCount":"0","resultStr":"{\"title\":\"Spontaneous symmetry breaking of coupled Fabry–Pérot nanocavities\",\"authors\":\"Jianming Mai, Xiansheng Huang, Xu Guo, Haihua Fan, Kok Wai Cheah\",\"doi\":\"10.1038/s42005-024-01700-y\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Ring cavities are quickly emerging as preferential platforms to investigate spontaneous symmetry breaking. However, research on handedness polarisation splitting within Kerr-coupled cavities is yet at a preliminary stage. Here, we observe experimentally spontaneous symmetry breaking in a non-Hermitian coupled Fabry‒Pérot nanocavity. In the experiment, horizontally polarised light is incident on the nanocavities, and symmetry breaking occurs when the power exceeds the symmetry breaking threshold of $$8\\\\,{{\\\\mbox{mW}}}$$ . We interpret such observation via nonlinear coupled mode theory, finding that an excitation power-dependent random splitting of right- or left-handed circular polarisations (RCP and LCP, respectively) emerges at the resonance peak. Further numerical simulations show that when the incident power is above the symmetry breaking threshold, the device exhibits spontaneous symmetry breaking characteristics: an additional polarisation component appears in the output field when the input field is monopolarised, and this is attributed to the imbalance of RCP and LCP. Our findings provide further understanding of spontaneous symmetry breaking in non-Hermitian systems and demonstrate the potential applications of the proposed device in optical signal processing. Synchronization between self-sustained oscillators is ubiquitous in nature and engineering, and it is generally accepted to occur due to weak interactions between the oscillating objects. The authors challenge this paradigm by presenting a theoretical higher-order phase model for non-weak coupling validated through experiments.\",\"PeriodicalId\":10540,\"journal\":{\"name\":\"Communications Physics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.4000,\"publicationDate\":\"2024-07-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.nature.com/articles/s42005-024-01700-y.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Communications Physics\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://www.nature.com/articles/s42005-024-01700-y\",\"RegionNum\":1,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"PHYSICS, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Communications Physics","FirstCategoryId":"101","ListUrlMain":"https://www.nature.com/articles/s42005-024-01700-y","RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
Spontaneous symmetry breaking of coupled Fabry–Pérot nanocavities
Ring cavities are quickly emerging as preferential platforms to investigate spontaneous symmetry breaking. However, research on handedness polarisation splitting within Kerr-coupled cavities is yet at a preliminary stage. Here, we observe experimentally spontaneous symmetry breaking in a non-Hermitian coupled Fabry‒Pérot nanocavity. In the experiment, horizontally polarised light is incident on the nanocavities, and symmetry breaking occurs when the power exceeds the symmetry breaking threshold of $$8\,{{\mbox{mW}}}$$ . We interpret such observation via nonlinear coupled mode theory, finding that an excitation power-dependent random splitting of right- or left-handed circular polarisations (RCP and LCP, respectively) emerges at the resonance peak. Further numerical simulations show that when the incident power is above the symmetry breaking threshold, the device exhibits spontaneous symmetry breaking characteristics: an additional polarisation component appears in the output field when the input field is monopolarised, and this is attributed to the imbalance of RCP and LCP. Our findings provide further understanding of spontaneous symmetry breaking in non-Hermitian systems and demonstrate the potential applications of the proposed device in optical signal processing. Synchronization between self-sustained oscillators is ubiquitous in nature and engineering, and it is generally accepted to occur due to weak interactions between the oscillating objects. The authors challenge this paradigm by presenting a theoretical higher-order phase model for non-weak coupling validated through experiments.
期刊介绍:
Communications Physics is an open access journal from Nature Research publishing high-quality research, reviews and commentary in all areas of the physical sciences. Research papers published by the journal represent significant advances bringing new insight to a specialized area of research in physics. We also aim to provide a community forum for issues of importance to all physicists, regardless of sub-discipline.
The scope of the journal covers all areas of experimental, applied, fundamental, and interdisciplinary physical sciences. Primary research published in Communications Physics includes novel experimental results, new techniques or computational methods that may influence the work of others in the sub-discipline. We also consider submissions from adjacent research fields where the central advance of the study is of interest to physicists, for example material sciences, physical chemistry and technologies.