TY - JOUR
T1 - Unidirectional control of optically induced spin waves
AU - Yoshimine, I.
AU - Tanaka, Y. Y.
AU - Shimura, T.
AU - Satoh, T.
N1 - Funding Information:
This work was supported by grants from the Murata Science Foundation, Mitsubishi Foundation, KAKENHI (Grant Nos. 15H05454 and 26103004), and JSPS Core-to-Core Program, A. Advanced Research Networks.
Publisher Copyright:
© EPLA, 2017.
PY - 2017/3
Y1 - 2017/3
N2 - Unidirectional control of optically induced spin waves in a rare-earth iron garnet crystal is demonstrated. We observed the interference of two spin-wave packets with different initial phases generated by circularly polarized light pulses. This interference results in unidirectional propagation if the spin-wave sources are spaced apart at 1/4 of the wavelength of the spin waves and the initial phase difference is set to π/2. The propagating direction of the spin wave is switched by the polarization helicity of the light pulses. Moreover, in a numerical simulation, applying more than two spin-wave sources with a suitable polarization and spot shape, arbitrary manipulation of the spin wave by the phased array method was replicated.
AB - Unidirectional control of optically induced spin waves in a rare-earth iron garnet crystal is demonstrated. We observed the interference of two spin-wave packets with different initial phases generated by circularly polarized light pulses. This interference results in unidirectional propagation if the spin-wave sources are spaced apart at 1/4 of the wavelength of the spin waves and the initial phase difference is set to π/2. The propagating direction of the spin wave is switched by the polarization helicity of the light pulses. Moreover, in a numerical simulation, applying more than two spin-wave sources with a suitable polarization and spot shape, arbitrary manipulation of the spin wave by the phased array method was replicated.
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U2 - 10.1209/0295-5075/117/67001
DO - 10.1209/0295-5075/117/67001
M3 - Article
AN - SCOPUS:85019684258
SN - 0295-5075
VL - 117
JO - EPL
JF - EPL
IS - 6
M1 - 67001
ER -