All-Optical Generation and Time-Resolved Polarimetry of Magnetoacoustic Resonances via Transient Grating Spectroscopy

被引：4
作者：
Carrara, P. [1 ,2 ]
Brioschi, M. [1 ,2 ]
Longo, E.
Dagur, D. [1 ,4 ]
Polewczyk, V. [1 ]
Vinai, G. [1 ]
Mantovan, R. [3 ]
Fanciulli, M. [5 ]
Rossi, G. [2 ]
Panaccione, G. [1 ]
Cucini, R. [1 ]
机构：
[1] Consiglio Nazl Ric CNR, Ist Officina Materiali IOM, Area Sci Pk, I-34149 Trieste, Italy
[2] Univ Milan, Dipartimento Fis, Via Celoria 16, I-20133 Milan, Italy
[3] CNR, Inst Microelect & Microsyst, IMM Unit Agrate Brianza, Via C Olivetti 2, I-20864 Agrate Brianza, Italy
[4] Univ Trieste, Dipartimento Fis, Via Valerio 2, I-34127 Trieste, Italy
[5] Univ Milano Bicocca, Dipartimento Sci Materiali, I-20125 Milan, Italy
来源：
PHYSICAL REVIEW APPLIED | 2022年 / 18卷 / 04期
关键词：
FERROMAGNETIC-RESONANCE; SCATTERING; LINEWIDTH; FILMS;
D O I：
10.1103/PhysRevApplied.18.044009
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The generation and control of surface acoustic waves (SAWs) in a magnetic material are objects of an intense research effort focused on magnetoelastic properties, with fruitful ramifications in spin-wave -based quantum logic and magnonics. We implement a transient grating setup to optically generate SAWs also seeding coherent spin waves via magnetoelastic coupling in ferromagnetic media. In this work we report on SAW-driven ferromagnetic resonance (FMR) experiments performed on polycrystalline Ni thin films in combination with time-resolved Faraday polarimetry, which allows extraction of the value of the effective magnetization and of the Gilbert damping. The results are in full agreement with measurements on the very same samples from standard FMR. Higher-order effects due to parametric modulation of the magnetization dynamics, such as down-conversion, up-conversion, and frequency mixing, are observed, testifying the high sensitivity of this technique.
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页数：11
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