TY - JOUR
T1 - Optically pumped parametric amplification for micromechanical oscillators
AU - Zalalutdinov, M.
AU - Olkhovets, A.
AU - Zehnder, A.
AU - Ilic, B.
AU - Czaplewski, D.
AU - Craighead, H. G.
AU - Parpia, J. M.
PY - 2001/5/14
Y1 - 2001/5/14
N2 - Micromechanical oscillators in the rf range were fabricated in the form of silicon discs supported by a SiO2 pillar at the disk center. A low-power laser beam, (Plaser∼100 μW), focused at the periphery of the disk, causes a significant change of the effective spring constant producing a frequency shift, Δf(Δf/f∼10-4). The high quality factor, Q, of the disk oscillator (Q∼104) allows us to realize parametric amplification of the disk's vibrations through a double frequency modulation of the laser power. An amplitude gain of up to 30 was demonstrated, with further increase limited by nonlinear behavior and self-generation. Phase dependence, inherent in degenerate parametric amplification, was also observed. Using this technique, the sensitivity of detection of a small force is greatly enhanced.
AB - Micromechanical oscillators in the rf range were fabricated in the form of silicon discs supported by a SiO2 pillar at the disk center. A low-power laser beam, (Plaser∼100 μW), focused at the periphery of the disk, causes a significant change of the effective spring constant producing a frequency shift, Δf(Δf/f∼10-4). The high quality factor, Q, of the disk oscillator (Q∼104) allows us to realize parametric amplification of the disk's vibrations through a double frequency modulation of the laser power. An amplitude gain of up to 30 was demonstrated, with further increase limited by nonlinear behavior and self-generation. Phase dependence, inherent in degenerate parametric amplification, was also observed. Using this technique, the sensitivity of detection of a small force is greatly enhanced.
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U2 - 10.1063/1.1371248
DO - 10.1063/1.1371248
M3 - Article
AN - SCOPUS:0035858264
SN - 0003-6951
VL - 78
SP - 3142
EP - 3144
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 20
ER -