Cherenkov-type terahertz emission from ultrafast magnetization in a slab of magnetooptic material
| Autor: | Michael I. Bakunov, S. A. Sychugin, E A Anisimov |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Inverse Faraday effect
Materials science Terahertz radiation business.industry Physics::Optics Physics::Classical Physics Laser Atomic and Molecular Physics and Optics Terbium gallium garnet Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound Optics chemistry Physics::Plasma Physics law Slab Prism business Ultrashort pulse Cherenkov radiation |
| Zdroj: | Journal of Optics. 17:035507 |
| ISSN: | 2040-8986 2040-8978 |
| Popis: | We develop a theory of terahertz emission from a slab of a magnetooptic material traversed by a circularly polarized femtosecond laser pulse. The Cherenkov-type radiation is generated by a moving region of ultrafast magnetization optically induced in the slab via the inverse Faraday effect. A prism is used to couple the radiation from the slab to free space. Our theory accounts for transient effects at the slab boundaries and shows their significance for the interpretation of the terahertz waveform emitted from the slab. The theory predicts detectability of the radiation generated by a mJ-level laser pulse in a terbium gallium garnet slab covered with a sapphire prism. |
| Databáze: | OpenAIRE |
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