Optomechanically induced sum sideband generation.

Sum sideband generation in a generic optomechanical system is discussed in the parameter configuration of optomechanically induced transparency. The nonlinear terms of the optomechanical dynamics are taken account and the features of the sum sideband generation are identified based on the analytical treatment. The nonlinear optomechanical interactions between cavity fields and the mechanical oscillation, which emerging as a new frontier in cavity optomechanics, are responsible for the generation of the frequency components at the sum sideband. We analyze in detail the influences of some parameters, including the pump power of the control field and the frequencies of the probe fields, on the sum sideband generation. The results clearly indicate that sum sideband generation can be significantly enhanced via achieving the matching conditions. The effect of sum sideband generation may be accessible in experiments and have potential application for achieving high precision measurement and on-chip manipulation of light propagation.