Magneto-optical spectroscopy based on pump-probe strobe light
Year: 2025
Type: preprint
Abstract: We demonstrate a pump-probe strobe light spectroscopy for sensitive detection of magneto-optical dynamics in the context of hybrid magnonics. The technique uses a combinatorial microwave-optical pump-probe scheme, leveraging both the high-energy resolution of microwaves and the high-efficiency detection using optical photons. In contrast to conventional stroboscopy using a continuous-wave light, we apply microwave and optical pulses with varying pulse widths, and demonstrate magnetooptical detection of magnetization dynamics in Y3Fe5O12 films. The detected magneto-optical signals strongly depend on the characteristics of both the microwave and the optical pulses as well as their relative time delays. We show that good magneto-optical sensitivity and coherent stroboscopic character are maintained even at a microwave pump pulse of 1.5 ns and an optical probe pulse of 80 ps, under a 7 megahertz clock rate, corresponding to a pump-probe footprint of ~1% in one detection cycle. Our results show that time-dependent strobe light measurement of magnetization dynamics can be achieved in the gigahertz frequency range under a pump-probe detection scheme.
Source: arXiv (Cornell University)
Authors: Zhou, Shihao, Zhu, Yujie, Tang, Chunli, Sun, Rui, Wu, Junming, Xiong, Yuzan, Russell, Ingrid E., Li, Yi, Sun, Dali, Tsui, Frank, Yang, Binbin, Novosad, Valentine, Hu, Jia-Mian, Jin, Wencan, Zhang, Wei
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7102596067
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