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

Summary, in English

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

• Author: Chih Hao Huang; Boris Louis; Roger Bresolí-Obach; Tetsuhiro Kudo; Rafael Camacho; Ivan G. Scheblykin; Teruki Sugiyama; Johan Hofkens; Hiroshi Masuhara
• Department/s: LTH Profile Area: Nanoscience and Semiconductor Technology; Chemical Physics; NanoLund: Centre for Nanoscience; LTH Profile Area: Photon Science and Technology
• Publishing year: 2022-12-01
• Language: English
• Publication/Series: Nature Communications
• Volume: 13
• Issue: 1
• Links: http://dx.doi.org/10.1038/s41467-022-33070-w
• Document type: Journal article
• Publisher: Nature Publishing Group
• Topic: Atom and Molecular Physics and Optics
• Status: Published
• ISBN/ISSN/Other: ISSN: 2041-1723