{"title":"抑制片上光子对源的外部噪声","authors":"Woncheol Shin, Kiwon Kwon, Dongjin Lee, Heedeuk Shin","doi":"10.1007/s40042-024-01141-4","DOIUrl":null,"url":null,"abstract":"<div><p>Quantum photonic integrated circuits are ideal for photon-based complex quantum information systems due to their size, stability, and scalability. Photon-pair sources integrated into these circuits help reduce connection losses. These pairs are generated by pumping strong light through optical fibers into the chip, which can introduce unwanted noise photons, lowering the performance of quantum sources. Here, we studied photon pairs generated solely from on-chip sources to improve quantum photonic applications. External filtering often fails due to environmental influences, leading us to propose on-chip filters before and after photon-pair generation to mitigate external noise. We fabricated silicon waveguides with and without on-chip asymmetric Mach–Zehnder interferometer filters and analyzed photon pair properties through experiments. The results showed that on-chip filters effectively eliminate external noise, tripling the coincidence-to-accidental coincidence ratio. This suggests that on-chip filtering holds significant promise for enhancing quantum photonic applications like quantum communications and computations.</p></div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":null,"pages":null},"PeriodicalIF":0.8000,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Suppression of external noise in on-chip photon-pair sources\",\"authors\":\"Woncheol Shin, Kiwon Kwon, Dongjin Lee, Heedeuk Shin\",\"doi\":\"10.1007/s40042-024-01141-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Quantum photonic integrated circuits are ideal for photon-based complex quantum information systems due to their size, stability, and scalability. Photon-pair sources integrated into these circuits help reduce connection losses. These pairs are generated by pumping strong light through optical fibers into the chip, which can introduce unwanted noise photons, lowering the performance of quantum sources. Here, we studied photon pairs generated solely from on-chip sources to improve quantum photonic applications. External filtering often fails due to environmental influences, leading us to propose on-chip filters before and after photon-pair generation to mitigate external noise. We fabricated silicon waveguides with and without on-chip asymmetric Mach–Zehnder interferometer filters and analyzed photon pair properties through experiments. The results showed that on-chip filters effectively eliminate external noise, tripling the coincidence-to-accidental coincidence ratio. This suggests that on-chip filtering holds significant promise for enhancing quantum photonic applications like quantum communications and computations.</p></div>\",\"PeriodicalId\":677,\"journal\":{\"name\":\"Journal of the Korean Physical Society\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.8000,\"publicationDate\":\"2024-07-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of the Korean Physical Society\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s40042-024-01141-4\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"PHYSICS, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the Korean Physical Society","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s40042-024-01141-4","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
Suppression of external noise in on-chip photon-pair sources
Quantum photonic integrated circuits are ideal for photon-based complex quantum information systems due to their size, stability, and scalability. Photon-pair sources integrated into these circuits help reduce connection losses. These pairs are generated by pumping strong light through optical fibers into the chip, which can introduce unwanted noise photons, lowering the performance of quantum sources. Here, we studied photon pairs generated solely from on-chip sources to improve quantum photonic applications. External filtering often fails due to environmental influences, leading us to propose on-chip filters before and after photon-pair generation to mitigate external noise. We fabricated silicon waveguides with and without on-chip asymmetric Mach–Zehnder interferometer filters and analyzed photon pair properties through experiments. The results showed that on-chip filters effectively eliminate external noise, tripling the coincidence-to-accidental coincidence ratio. This suggests that on-chip filtering holds significant promise for enhancing quantum photonic applications like quantum communications and computations.
期刊介绍:
The Journal of the Korean Physical Society (JKPS) covers all fields of physics spanning from statistical physics and condensed matter physics to particle physics. The manuscript to be published in JKPS is required to hold the originality, significance, and recent completeness. The journal is composed of Full paper, Letters, and Brief sections. In addition, featured articles with outstanding results are selected by the Editorial board and introduced in the online version. For emphasis on aspect of international journal, several world-distinguished researchers join the Editorial board. High quality of papers may be express-published when it is recommended or requested.