Department of Applied Physics and Eindhoven Hendrik Casimir Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands.
Center for Nanophotonics, AMOLF, Science Park 104, 1098 XG, Amsterdam, The Netherlands.
Nat Commun. 2023 Mar 18;14(1):1526. doi: 10.1038/s41467-023-37138-z.
The nonlinear component of the optomechanical interaction between light and mechanical vibration promises many exciting classical and quantum mechanical applications, but is generally weak. Here we demonstrate enhancement of nonlinear optomechanical measurement of mechanical motion by using pairs of coupled optical and mechanical modes in a photonic crystal device. In the same device we show linear optomechanical measurement with a strongly reduced input power and reveal how both enhancements are related. Our design exploits anisotropic mechanical elasticity to create strong coupling between mechanical modes while not changing optical properties. Additional thermo-optic tuning of the optical modes is performed with an auxiliary laser and a thermally-optimised device design. We envision broad use of this enhancement scheme in multimode phonon lasing, two-phonon heralding and eventually nonlinear quantum optomechanics.
光与机械振动的光机械相互作用的非线性分量有望实现许多令人兴奋的经典和量子力学应用，但通常较弱。在这里，我们展示了通过在光子晶体器件中使用成对的耦合光学和机械模式来增强机械运动的非线性光机械测量。在相同的器件中，我们展示了具有大大降低输入功率的线性光机械测量，并揭示了这两种增强之间的关系。我们的设计利用各向异性机械弹性在不改变光学性质的情况下在机械模式之间产生强耦合。使用辅助激光和热优化的器件设计对光学模式进行附加的热光调谐。我们设想在多模声子激光、双声子报喜以及最终的非线性量子光机械学中广泛使用这种增强方案。
