Laser-Induced Transition between Nonlinear and Linear Resonant Behaviors of a Micromechanical Oscillator

We investigate both theoretically and experimentally a laser-based controlled tuning of the nonlinear behaviors of a single mechanical resonator. Thanks to localized three-dimensional modifications induced by femtosecond-laser irradiation, a Duffing-like oscillator is switched from a hardening resonance to a linear response and then to a softening resonance and exhibits a wide tunability of the resonant frequency and a remarkable increase of its linear dynamic range. The principles that underlie laser-tuned nonlinear oscillators are generic and simple, suggesting its wide applicability not only for micro-or nano-optomechanical systems but also as a generic framework for characterizing and understanding the physics of in-volume laser-affected zones.


Published in:
Physical Review Applied, 7, 6, 064002
Year:
2017
Publisher:
College Pk, Amer Physical Soc
ISSN:
2331-7019
Laboratories:




 Record created 2017-07-10, last modified 2018-12-03


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