Soft-x-ray nonlinear optical phenomena observed at SACLA
Creators
- 1. Hochfeld-Magnetlabor Dresden (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, Dresden (Germany)
- 2. Tokyo University, Institute for Solid State Physics, Kashiwa, Chiba (Japan)
Description
We present results of soft-x-ray second-harmonic generation from a bulk transition-metal oxide with lack of space-inversion symmetry. In the visible and the hard-x-ray range, coherent amplification of nonlinear signals has been used in a transmission geometry. However, soft-x-ray light put limitations on the transmission geometry due to its strong absorption by materials. Here, we observed the second harmonics in a reflection geometry through the combination of an ultrabrilliant soft-x-ray free-electron laser and the inner-shell resonant-enhancement effect. This resonant scheme in the soft-x-ray range provides information on inversion symmetry with element selectivity. In addition, future prospects of the soft-x-ray nonlinear-optical effects will be discussed. (author)
Abstract (Japanese)
空間反転対称性を持たないバルク遷移金属酸化物からの軟X線第二次高調波発生の研究結果を紹介する。これまで可視・硬X線域では,コヒーレントな信号増幅を伴う透過配置が取られてきたが,軟X線では物質の吸収が強く,その測定に制限があった。今回,大強度の軟X線自由電子レーザーと,内殻共鳴による増大効果を利用することで,軟X線第二次高調波を反射配置で観測した。共鳴下の軟X線非線形光学効果は,バルクから薄膜試料に至るまで様々な物質群に対して元素選択的かつ,大域的空間反転対称性の破れに敏感なプローブとして適用できる。軟X線自由電子レーザーを用いた非線形光学研究の将来展望についても議論する。(著者)Additional details
Additional titles
- Original title (Japanese)
- SACLAによる軟X線非線形光学現象の開拓
Publishing Information
- Journal Title
- Hoshako
- Journal Volume
- 32
- Journal Issue
- 6
- Series
- 雑誌名:放射光
- Journal Page Range
- p. 307-313
- ISSN
- 0914-9287
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 51037436
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S43: PARTICLE ACCELERATORS;
- Descriptors DEI
- DIPOLES; ELECTRON BEAMS; EXCITED STATES; FERMI LEVEL; FREE ELECTRON LASERS; HARMONICS; LIGHT SOURCES; OPTICS; SIGNAL-TO-NOISE RATIO; SPONTANEOUS FISSION; SYMMETRY; TRANSITION ELEMENTS; TRANSMISSION; X-RAY LASERS
- Descriptors DEC
- BEAMS; DECAY; DIMENSIONLESS NUMBERS; ELEMENTS; ENERGY LEVELS; FISSION; LASERS; LEPTON BEAMS; METALS; MULTIPOLES; NUCLEAR DECAY; NUCLEAR REACTIONS; OSCILLATIONS; PARTICLE BEAMS; RADIATION SOURCES
Optional Information
- Notes
- 29 refs., 8 figs.