Feedback Control and Characterization of a Microcantilever Using Optical Radiation Pressure
We describe a method for feedback-regulation of a microcantilever's response using optical radiation pressure. One laser measures the position of the cantilever and another laser applies a force that is a phase-shifted function of that position. The force is due solely to the momentum of the ph...
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| Veröffentlicht in: | arXiv.org 2006-07 |
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| creator | Weld, D M Kapitulnik, A |
| description | We describe a method for feedback-regulation of a microcantilever's response using optical radiation pressure. One laser measures the position of the cantilever and another laser applies a force that is a phase-shifted function of that position. The force is due solely to the momentum of the photons in the laser. The feedback changes the microcantilever's effective quality factor Qeff and effective temperature Teff. Reduction of both Qeff and Teff by more than a factor of 15 is demonstrated. Additionally, we suggest a method for determination of a microcantilever's spring constant using the known force exerted on it by radiation pressure. |
| doi_str_mv | 10.48550/arxiv.0606394 |
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| subjects | Feedback control Lasers Optical radiation Photons Position measurement Q factors Radiation pressure Spring constant |
| title | Feedback Control and Characterization of a Microcantilever Using Optical Radiation Pressure |
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