期刊
NATURE PHOTONICS
卷 10, 期 2, 页码 111-+出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHOTON.2015.249
关键词
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资金
- European Community Seventh Framework Programme [FP7-NMP-2011-SMALL-281043]
- European Research Council ERC Grant agreement [257280]
- Foundation for Fundamental Research on Matter (FOM)
- Netherlands Organization for Scientific Research(NWO), program Leading Scientist of the Russian Ministry of Education and Science [14.z50.31.0034]
The magneto-optical Faraday effect played a crucial role in the elucidation of the electromagnetic nature of light. Today it is powerful means to probe magnetism and the basic operational principle of magneto-optical modulators. Understanding the mechanisms allowing for modulation of the magneto-optical response at terahertz frequencies may have far-reaching consequences for photonics(1), ultrafast optomagnetism(2-4) and magnonics(5,6), as well as for future development of ultrafast Faraday modulators. Here we suggest a conceptually new approach for an ultrafast tunable magneto-optical modulation with the help of counter-propagating laser pulses. Using terbium gallium garnet (Tb3Ga5O12) we demonstrate the feasibility of such magneto-optical modulation with a frequency up to 1.1 THz, which is continuously tunable by means of an external magnetic field. Besides the novel concept for ultrafast magneto-optical polarization modulation, our findings reveal the importance of accounting for propagation effects in the interpretation of pump-probe magneto-optical experiments.
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