Wei Wang, Yang Tan, Jingjing Liu, Bin Liang, Jianchun Cheng
{"title":"Giant Acoustic Geometric Spin and Orbital Hall Effect","authors":"Wei Wang, Yang Tan, Jingjing Liu, Bin Liang, Jianchun Cheng","doi":"arxiv-2405.14202","DOIUrl":null,"url":null,"abstract":"Acoustic waves in fluid with spin-0 nature have been long believed not to\nsupport spin Hall effect and strong orbital Hall effect that enables\nexperimental observation. Here we report the first theoretical explication and\nexperimental demonstration of giant acoustic geometric spin and orbital Hall\neffect characterized by a large transverse shift. We reveal that this effect\noccurs when a vortex beam is observed from a tilted reference frame free of\nwave-interface interactions or gradient-index media needed for observing\nconventional ones, and can be amplified by simply binding the beam tightly.\nThanks to this mechanism, large transverse shifts proportional to angular\nmomentum are observed in a compact system. Our work provides deeper insights\ninto the physics of angular momentum of classic waves.","PeriodicalId":501482,"journal":{"name":"arXiv - PHYS - Classical Physics","volume":"66 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - Classical Physics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2405.14202","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Acoustic waves in fluid with spin-0 nature have been long believed not to
support spin Hall effect and strong orbital Hall effect that enables
experimental observation. Here we report the first theoretical explication and
experimental demonstration of giant acoustic geometric spin and orbital Hall
effect characterized by a large transverse shift. We reveal that this effect
occurs when a vortex beam is observed from a tilted reference frame free of
wave-interface interactions or gradient-index media needed for observing
conventional ones, and can be amplified by simply binding the beam tightly.
Thanks to this mechanism, large transverse shifts proportional to angular
momentum are observed in a compact system. Our work provides deeper insights
into the physics of angular momentum of classic waves.
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