Dissipative optomechanics in high-frequency nanomechanical resonators

Abstract

The coherent transduction of information between microwave and optical domains is a fundamental building block for future quantum networks. A promising way to bridge these widely different frequencies is using high-frequency nanomechanical resonators interacting with low-loss optical modes. State-of-the-art optomechanical devices rely on purely dispersive interactions that are enhanced by a large photon population in the cavity. Additionally, one could use dissipative optomechanics, where photons can be scattered directly from a waveguide into a resonator hence increasing the degree of control of the acousto-optic interplay. Hitherto, such dissipative optomechanical interaction was only demonstrated at low mechanical frequencies, precluding prominent applications such as the quantum state transfer between photonic and phononic domains. Here, we show the first dissipative optomechanical system operating in the sideband-resolved regime, where the mechanical frequency is larger than the optical linewidth. Exploring this unprecedented regime, we demonstrate the impact of dissipative optomechanical coupling in reshaping both mechanical and optical spectra. Our figures represent a two-order-of-magnitude leap in the mechanical frequency and a tenfold increase in the dissipative optomechanical coupling rate compared to previous works. Further advances could enable the individual addressing of mechanical modes and help mitigate optical nonlinearities and absorption in optomechanical devices.

Nonlinearly induced entanglement in dissipatively coupled optomechanical system

“…Dissipative coupling has been experimentally realized in membrane optomechanical systems [27,65] and crystal optomechanical systems. [31,66] Among these, the membrane optomechanical system offers adjustable coupling coefficients g ω and g κ , but the coupling strength is weak, [27,28,65] whereas the crystal optomechanical system provides stronger coupling, albeit with challenging adjustments of g ω and g κ . [31,66] In our discussion, no specific requirements are imposed on the system parameters.…”

“…[31,66] Among these, the membrane optomechanical system offers adjustable coupling coefficients g ω and g κ , but the coupling strength is weak, [27,28,65] whereas the crystal optomechanical system provides stronger coupling, albeit with challenging adjustments of g ω and g κ . [31,66] In our discussion, no specific requirements are imposed on the system parameters. The key to achieving bistability lies in the coupling coefficient g ω and the driving strength ε d .…”

Chaos control and exceptional point engineering via dissipative optomechanical coupling

“…. The solution of equation (12) can then be used in the fluctuation dynamics equation (10) for the EP analysis. For this purpose we change to another interaction picture by introducing the following slowly varying operators with tildes,…”

“…Optomechanical coupling, an interaction between an electromagnetic field and mechanical objects, is a nice platform to foster quantum breakthroughs for both fundamental and technological purposes [1]. Two main optomechanical couplings are investigated in the literature, the dispersive couplings [1] and the dissipative coupling [2][3][4][5][6][7][8][9][10]. The former is well known and widely used, while the latter, which also leads to nice features as well seems to attract less attention.…”

“…Similarly, interesting achievements have been made in the dissipative's COM framework. These achievements include normal mode splitting [3], strong-coupling effect [5], squeezing [6,7,9], detection [8] and recently for the improvement of the dissipative coupling rate [10]. To the best of our knowledge, there are no EPs studies in the literature involving dissipative COM, although they share common promising features with their dispersive counterparts.…”