Noise squeezing in a nanomechanical Duffing resonator.
We study mechanical amplification and noise squeezing in a nonlinear nanomechanical resonator driven by an intense pump near its dynamical bifurcation point, namely, the onset of Duffing bistability. Phase sensitive amplification is achieved by a homodyne detection scheme, where the displacement detector's output, which has a correlated spectrum around the pump frequency, is down-converted by mixing with a local oscillator operating at the pump frequency with an adjustable phase. The down-converted signal at the mixer's output could be either amplified or deamplified, yielding noise squeezing, depending on the local oscillator phase.
Almog
R
R
Department of Electrical Engineering, Technion, Haifa 32000, Israel.
Zaitsev
S
S
Shtempluck
O
O
Buks
E
E
D000465:Algorithms; D000669:Amplifiers, Electronic; D036103:Nanotechnology; D017711:Nonlinear Dynamics; D014732:Vibration