Ultrashort microwave pulses generated due to three magnon interactions
Ultrashort microwave pulses generated due to three magnon interactions
复制标题
由于三个磁振子相互作用产生的超短微波脉冲
作者：
Synogach;Fetisov;Mathieu;Patton
利用Y铁石榴石薄膜中的非线性静磁表面波产生了极窄的2 ns宽的微波脉冲。当输入功率约为300 mW，载波频率低于3.3 GHz时，输出脉冲最短，幅度最大。结果在基于三个磁振子过程的偶极交换自旋波模的模型中得到了解释。从输出脉冲的最小下降时间估计，这些过程发展的特征时间为1 ns。用布里渊光散射验证了相关模式的正确性。
Extremely narrow 2 ns wide microwave pulses are generated from nonlinear magnetostatic surface waves in yttrium iron garnet films. The shortest output pulse with the highest amplitude is achieved for input power levels of about 300 mW and a carrier frequency below 3.3 GHz. The results are explained within the model based on dipole exchange spin wave modes involved in three magnon processes. The characteristic time for these processes to develop, as estimated from the smallest fall time of output pulse, is 1 ns. The relevant modes are verified by Brillouin light scattering.