Abstract
In his 1927 paper in Nature, B. van der Pol described experiments in which an electrical circuit forming a relaxation oscillator was externally forced with continuously varying frequency. The circuit’s response, he found, was entrained to be only at whole submultiples of the forcing frequency, i.e. f/2, f/3, up to f/40. We describe similar results found in an optically actuated MEMS limit cycle oscillator. Doubly supported beams are excited into self-oscillation in their first mode of vibration by illuminating them within an interference field which couples absorption to displacement. While in limit cycle oscillation, they are mechanically shaken out of plane with continuously varying frequency, and the limit cycle response is seen to be entrained to multiples or submultiples of the forcing frequency f/3, f/2, f, 2f, up to 7f.
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Acknowledgements
This work is supported under NSF grant 0600174 and was performed in part at the Cornell NanoScale Facility, a member of the National Nanotechnology Infrastructure Network, which is supported by the National Science Foundation (Grant ECS-0335765). This work also made use of the Integrated Advanced Microscopy and Materials facilities of the Cornell Center for Materials Research (CCMR) with support from the National Science Foundation Materials Research Science and Engineering Centers (MRSEC) program (DMR 1120296).
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Blocher, D.B., Zehnder, A.T., Rand, R.H. (2013). Frequency Multiplication and Demultiplication in MEMS. In: Shaw, G., Prorok, B., Starman, L. (eds) MEMS and Nanotechnology, Volume 6. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-4436-7_9
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DOI: https://doi.org/10.1007/978-1-4614-4436-7_9
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