Please use this identifier to cite or link to this item: https://doi.org/10.1109/LPT.2005.862002
Title: Helical wave-front laser beam generated with a Microelectromechanical Systems (MEMS)-based device
Authors: Zhou, G. 
Chau, F.S. 
Keywords: Microelectromechanical systems (MEMS)
Micromirrors
Optical vortex
Trapping
Issue Date: 2006
Source: Zhou, G.,Chau, F.S. (2006). Helical wave-front laser beam generated with a Microelectromechanical Systems (MEMS)-based device. IEEE Photonics Technology Letters 18 (1) : 292-294. ScholarBank@NUS Repository. https://doi.org/10.1109/LPT.2005.862002
Abstract: We report a novel helical wave-front laser beam generator based on microelectromechanical systems (MEMS) technology. The device consists of a circular array of micromirrors; each can be electrostatically actuated to move perpendicular to the substrate to modulate the phase of an incident laser beam. A prototype device has been developed using the polysilicon multiuser MEMS processes. The ability of the device to transform a plane wave into an l = 3 helical wave-front laser beam has been experimentally demonstrated. Additionally, the device is faster by two orders of magnitude or more than conventional liquid crystal spatial light modulators. In combination with a rapid optical beam steering system, the proposed device might provide new capabilities for fast-scanned optical tweezer arrays, allowing them to combine optical vortices and conventional traps together to trap, guide, and rotate a wide variety of particles. © 2005 IEEE.
Source Title: IEEE Photonics Technology Letters
URI: http://scholarbank.nus.edu.sg/handle/10635/60439
ISSN: 10411135
DOI: 10.1109/LPT.2005.862002
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