The primeval optical evolving matter by optical binding inside and outside the photon beam

• DOI: 10.1038/s41467-022-33070-w
• Publication Date: 2022-09-10T04:03:03Z
• Authors: Chih-Hao Huang; Boris Louis; Roger Bresolí-Obach; Tetsuhiro Kudo; Rafael Camacho; Ivan G. Scheblykin; Teruki Sugiyama; Johan Hofkens; Hiroshi Masuhara
• Keywords: Two-photon excitation microscopy

Abstract Optical binding has recently gained considerable attention because it enables the light-induced assembly of many-body systems; however, this phenomenon only been described between directly irradiated particles. Here, we demonstrate that optical can occur outside focal spot a single tightly focused laser beam. By trapping at an interface, assemble up to three gold nanoparticles with linear arrangement which fully-occupies focus. The is efficiently scattered by alignment and interacts particles focus area, generating several discrete arc-shape potential wells half-wavelength periodicity. Those external inside arcs show correlated motion not aligned particles, but also themselves even both are illuminated. We propose optically bound back-scattered light multi-channel scattering, forming dynamic network.