TY  - JOUR
A1  - Milde, Peter
A1  - Langenhorst, Malte
A1  - Hölscher, Hendrik
A1  - Rottmann-Matthes, Jens
A1  - Hundertmark, Dirk
A1  - Eng, Lukas
A1  - Hoffmann-Vogel, Regina
T1  - Out-of-equilibrium optomechanical resonance self-excitation
T2  - Journal of applied physics
N2  - The fundamental sensitivity limit of atomic force microscopy is strongly correlated to the thermal noise of cantilever oscillation. A method to suppress this unwanted noise is to reduce the bandwidth of the measurement, but this approach is limited by the speed of the measurement and the width of the cantilever resonance, commonly defined through the quality factor Q. However, it has been shown that optomechanical resonances in interferometers might affect cantilever oscillations resulting in an effective quality factor Q(eff). When the laser power is sufficiently increased cantilever oscillations might even reach the regime of self-oscillation. In this self-oscillation state, the noise of the system is partially determined by the interaction with laser light far from equilibrium. Here, we show and discuss how tuning of laser power leads to nonlinear optomechanical effects that can dramatically increase the effective quality factor of the cantilever leading to out-of-equilibrium noise. We model the effects using a fourth order nonlinearity of the damping coefficient. Published under an exclusive license by AIP Publishing.
KW  - Electrical properties and parameters
KW  - Ultra-high vacuum
KW  - Electronic noise
KW  - Signal processing
KW  - Noise floor
KW  - Atomic force microscopy
KW  - Hooke's law
KW  - Interferometry
KW  - Optical resonators
KW  - Thermo optic effects
Y1  - 2021
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/64728
SN  - 0021-8979
SN  - 1089-7550
VL  - 130
IS  - 3
PB  - American Institute of Physics
CY  - Melville
ER  -