微波频率下实现的石墨烯光力学
Graphene optomechanics realized at microwave frequencies.
作者信息
Song X, Oksanen M, Li J, Hakonen P J, Sillanpää M A
机构信息
O. V. Lounasmaa Laboratory, Low Temperature Laboratory, Aalto University, P.O. Box 15100, FI-00076 Aalto, Finland.
O. V. Lounasmaa Laboratory, Low Temperature Laboratory, Aalto University, P.O. Box 15100, FI-00076 Aalto, Finland. and Department of Applied Physics, Aalto University School of Science, P.O. Box 11100, FI-00076 Aalto, Finland.
出版信息
Phys Rev Lett. 2014 Jul 11;113(2):027404. doi: 10.1103/PhysRevLett.113.027404.
Cavity optomechanics has served as a platform for studying the interaction between light and micromechanical motion via radiation pressure. Here we observe such phenomena with a graphene mechanical resonator coupled to an electromagnetic mode. We measure thermal motion and backaction cooling in a bilayer graphene resonator coupled to a microwave on-chip cavity. We detect the lowest flexural mode at 24 MHz down to 60 mK, corresponding to 50±6 mechanical quanta, which represents a phonon occupation that is nearly 3 orders of magnitude lower than that which has been recorded to date with graphene resonators.
腔光力学已成为通过辐射压力研究光与微机械运动之间相互作用的平台。在这里，我们利用与电磁模式耦合的石墨烯机械谐振器观察到了此类现象。我们测量了与微波片上腔耦合的双层石墨烯谐振器中的热运动和反作用冷却。我们在24兆赫兹至60毫开尔文的温度下检测到最低弯曲模式，对应于50±6个机械量子，这代表了声子占有率，比迄今为止用石墨烯谐振器记录的占有率低近3个数量级。
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