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|Title:||Helical wave-front laser beam generated with a Microelectromechanical Systems (MEMS)-based device|
|Authors:||Zhou, G. |
|Keywords:||Microelectromechanical systems (MEMS)|
|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|
|Appears in Collections:||Staff Publications|
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