title: Three-axis rapid steering of optically propelled micro/nanoparticles.
abstract: This paper presents the design and implementation of a three-axis steering system, wherein a micro/nanoparticle is optically trapped and propelled to serve as a measurement probe. The actuators in the system consist of a deformable mirror enabling axial steering and a two-axis acousto-optic deflector for lateral steering. The actuation range is designed and calibrated to be over 20 microm along the two lateral axes and over 10 microm along the axial direction. The actuation bandwidth of the two lateral axes is over 50 kHz and the associated resolution is 0.016 nm (1sigma). The axial resolution is 0.16 nm, while the bandwidth is enhanced to over 3 kHz by model cancellation method. The performance of the three-axis steering system is illustrated by three sets of experiments. First, active Brownian motion control of the trapped probe is utilized to enhance trapping stability. Second, a large range three-dimensional (3D) steering of a 1.87 microm probe, contouring a complex 3D trajectory in a 6 x 6 x 4 microm3 volume, is demonstrated. Third, a closed-loop steering is implemented to achieve improved precision.
authors: Department of Mechanical Engineering, The Ohio State University, 201 West 19th Avenue, Columbus, Ohio 43210, USA.
authors: Yanan
authors: Y
authors: Huang
authors: Jingfang
authors: J
authors: Wan
authors: Ming-Chieh
authors: MC
authors: Cheng
authors: Zhipeng
authors: Z
authors: Zhang
authors: Sissy M
authors: SM
authors: Jhiang
authors: Chia-Hsiang
authors: CH
authors: Menq
mesh_terms: D000465:Algorithms; D002138:Calibration; D005246:Feedback; D007834:Lasers; D020527:Microscopy, Scanning Probe / Q000295:instrumentation / Q000379:methods; D053758:Nanoparticles; D055095:Optics and Photonics / Q000295:instrumentation / Q000379:methods