Galactic-form spinning beams

Galactic-form spinning beams | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Galactic-form spinning beams Saifollah Rasouli, Hossein Mohammadi, Li-Gang Wang This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7151603/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 31 Dec, 2025 Read the published version in Communications Physics → Version 1 posted You are reading this latest preprint version Abstract We present a new class of intensity-rotating structured beams generated by diffracting a plane wave through a pure amplitude spiral-like structure (SLS) composed of curved radial spokes, periodic in both radial and azimuthal directions. The resulting diffraction pattern consists of concentric rings with petal-like intensity spots, whose number and spacing are determined by the spoke count. Due to the spoke curvature, adjacent rings exhibit a relative azimuthal shift, causing the overall pattern to rotate around the optical axis during propagation, with angular speed proportional to the curvature. Simultaneously, the beam’s divergence reduces, evolving toward a quasi-non-diffractive regime. The high-intensity spots in the first ring follow helical trajectories resembling the grooves of a drill—thus termed “optical drill.” Across all rings, the spots trace spiral paths akin to galactic arms, inspiring the name “galactic-form spinning beams.” Phase analysis shows each ring carries vortex-like azimuthal phase variations with topological charge equal to the spoke number, while radial phase steps depend on curvature. Without curvature, the pattern resembles a radial carpet beam with net-zero charge. Experimental and numerical results confirm these dynamics. Such beams offer potential for optical trapping, enabling combined axial and rotational manipulation of particles along spiral trajectories. Physical sciences/Optics and photonics/Optical physics Physical sciences/Physics/Optical physics Structured light Spiral-like structures Multi-ring petal-shaped intensity patterns Optical beam rotation Galactic-form spinning beams Rotating vortex radial carpet beams Full Text Additional Declarations There is NO Competing Interest. Supplementary Files CaptionforVisualizations.docx Caption for Visualizations Visaulization2Fig.4.mp4 Visualization 2 Visaulization8Fig.9.mp4 Visualization 8 Visaulization5Fig.6.mp4 Visualization 5 Visaulization9Fig.10.mp4 Visualization 9 Visaulization7Fig.8.mp4 Visualization 7 Visaulization3Fig.4Xtext.mp4 Visualization 3 Visaulization1Fig.4.mp4 Visualization 1 Visaulization4Fig.5.mp4 Visualization 4 Visaulization10Fig.12.mp4 Visualization 10 Visaulization11Fig.13.mp4 Visualization 11 Visaulization6Fig.8.mp4 Visualization 6 Cite Share Download PDF Status: Published Journal Publication published 31 Dec, 2025 Read the published version in Communications Physics → Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. 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