Bidirectional conversion between microwave and light via ferromagnetic magnons
Bidirectional conversion between microwave and light via ferromagnetic magnons
复制标题
DOI：
10.1103/physrevb.93.174427
复制
发表时间：
2016-05-27
影响因子：
3.7
通讯作者：
Nakamura, Y.
中科院分区：
文献类型：
--
作者：
Hisatomi, R.;Osada, A.;Nakamura, Y.
微波和可见光光子在单量子能级上的相干转换可以显著扩展我们在各个领域处理信号的能力。将微波域中的微弱信号有效地上变频到光域将导致量子噪声受限的微波放大器。光学光子和微波光子之间的相干交换也将是实现长距离量子通信的敲门砖。在这里，我们展示了双向和相干转换微波和光使用集体自旋激发铁磁体。该转换器由两个谐振子模式，微波腔模式和称为基特尔模式的静磁模式，其中微波光子和磁振子在各自的模式强烈耦合和杂交。巡回微波场和行进光场可以通过混合系统耦合，其中微波场通过腔模式耦合到混合系统，而光场经由法拉第和逆法拉第效应通过基特尔模式寻址混合系统。对转换效率进行了理论分析和实验评价。文中还讨论了提高效率的可能方案。
Coherent conversion of microwave and optical photons in the single quantum level can significantly expand our ability to process signals in various fields. Efficient up-conversion of a feeble signal in the microwave domain to the optical domain will lead to quantum-noise-limited microwave amplifiers. Coherent exchange between optical photons and microwave photons will also be a stepping stone to realize long-distance quantum communication. Here we demonstrate bidirectional and coherent conversion between microwave and light using collective spin excitations in a ferromagnet. The converter consists of two harmonic oscillator modes, a microwave cavity mode and a magnetostatic mode called the Kittel mode, where microwave photons and magnons in the respective modes are strongly coupled and hybridized. An itinerant microwave field and a traveling optical field can be coupled through the hybrid system, where the microwave field is coupled to the hybrid system through the cavity mode, while the optical field addresses the hybrid system through the Kittel mode via Faraday and inverse Faraday effects. The conversion efficiency is theoretically analyzed and experimentally evaluated. The possible schemes for improving the efficiency are also discussed.