2014/11/18 by Yixiang Li, Li, Yixiang, Chunyin Qiu +7
Engineering · Physics and Astronomy · #FOS: Physical sciences #Microfluidic and Bio-sensing Technologies #Near-Field Optical Microscopy #Optics (physics.optics) #Orbital Angular Momentum in Optics #physics.optics
paper · pdf · doi:10.48550/arxiv.1411.4776
7 figures
arxiv created 2014/11/18 · openalex publication_date 2014/11/18 · arxiv updated 2014/11/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Conventional microparticle transports by light or sound are realized along a straight line. Recently, this limit has been overcome in optics as the growing up of the self-accelerating Airy beams, which are featured by many peculiar properties, e.g., bending propagation, diffraction-free and self-healing. However, the bending angles of Airy beams are rather small since they are only paraxial solutions of the two-dimensional (2D) Helmholtz equation. Here we propose a novel micromanipulation by using acoustic Half-Bessel beams, which are strict solutions of the 2D Helmholtz equation. Compared with that achieved by Airy beams, the bending angle of the particle trajectory attained here is much steeper (exceeding 90o). The large-angle bending transport of microparticles, which is robust to complex scattering environment, enables a wide range of applications from the colloidal to biological sciences.