光波動的な磁気制御
Florian Siegrist1,2, Julia A Gessner1,2, Marcus Ossiander1
1Max-Planck-Institute of Quantum Optics, Garching, Germany.
Nature
|June 28, 2019
まとめ
研究 者 たち は,光 を 用い て 磁気 特性 を 直接 操作 する 超 速 の 協調 的 な 磁気 を 示し て いる
科学分野:
- 凝縮物質物理学
- 量子光学
- 材料科学
背景:
- 電気磁気は基本的なもので 光波の電子が 電子的性質を制御します
- 磁気特性は通常間接的かつゆっくりと制御され,スピントロニックアプリケーションを制限します.
- マグネティズムの直接的,超高速制御は,長年の挑戦でした.
研究 の 目的:
- 超高速コヒーレント磁力を導入し,実証する.
- 光場による磁気特性の直接的な操作を実現する.
- 将来のスピントロニック装置の速度制限として光学周波数を設定する.
主な方法:
- アトセカンド時間解析の磁気円形二極化検出スキームを開発した.
- 量子ダイナミックモデリングを利用した.
- 超短時間のレーザーパルスを浴びた 鉄磁気層の積み重ねを調査した.
主要な成果:
- 光の電場振動による磁気特性の直接操作を達成した.
- 磁気反応時間を2度短縮した
- 光場による電荷移転による同期スピン/軌道運動移転を観測した.
結論:
- スピンダイナミクスとマクロスコーピック磁気モメントのコヘランス制御を明らかにした.
- スピントロニクスのための電子と磁気特性の同時制御を証明した.
- 一貫性スピントロニックアプリケーションの究極の速度制限として確立された光学周波数.
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