Emission of Terahertz Electromagnetic Waves by Femtosecond Laser Pulse Irradiation in Solids and Its Application to Materials Science
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- Kida Noriaki
- 東京大学大学院新領域創成科学研究科
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- Miyamoto Tatsuya
- 東京大学大学院新領域創成科学研究科
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- Okamoto Hiroshi
- 東京大学大学院新領域創成科学研究科 産総研・東大先端オペランド計測技術オープンイノベーションラボラトリ
Bibliographic Information
- Other Title
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- フェムト秒レーザーパルス励起によるテラヘルツ波放射とその物性研究への応用
- フェムトビョウ レーザーパルス レイキ ニ ヨル テラヘルツハ ホウシャ ト ソノ ブッセイ ケンキュウ エ ノ オウヨウ
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Abstract
<p>Terahertz radiation from a solid with no inversion symmetry irradiated with a femtosecond laser pulse is widely used as a light source in spectroscopy in the terahertz region. In this paper, we report that such a terahertz-radiation process itself can be used to study physical properties of solids associated with ferroelectric polarization and ferromagnetic magnetization, and their sub-picosecond dynamics. We show that a terahertz wave is emitted via the electric-dipole radiation mechanism from organic ferroelectrics and can be utilized to map out ferroelectric domain structures. We also demonstrate that the magnetic domain imaging in ferro (ferri)-magnets is possible by detecting a terahertz radiation induced via the magnetic-dipole radiation. In addition, we report new kinds of terahertz-radiation phenomena; a terahertz radiation with high efficiency in a photoinduced ferroelectric to paraelectric transition, a narrow-band terahertz radiation by an impulsive stimulated Raman process, and a terahertz radiation by a spin-polarized current.</p>
Journal
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- Butsuri
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Butsuri 74 (5), 314-324, 2019-05-05
The Physical Society of Japan
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Details 詳細情報について
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- CRID
- 1390845702294603648
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- NII Article ID
- 130007723496
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- NII Book ID
- AN00196952
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- ISSN
- 24238872
- 00290181
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- NDL BIB ID
- 029664169
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed