固体におけるアット秒非線形極化と光物質のエネルギー伝達
A Sommer1, E M Bothschafter1,2, S A Sato3
1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, 85748 Garching, Germany.
Nature
|June 3, 2016
まとめ
アット秒計測は可視光でペタヘルツ周波数で 超高速の光学スイッチングを可能にします この突破は光物質の エネルギー伝達ダイナミクスの 洞察力をもたらします
科学分野:
- 量子光学
- アットセカンド科学
- 固体物理学
背景:
- 非線形光学偏振は,光物質相互作用と高速信号操作に不可欠です.
- 既存のテラヘルツ技術は,いくつかのテラヘルツ周波数までの実験的アクセスを提供します.
- アット秒メトロロジーは,より高い周波数解像度の可能性を秘めています.
研究 の 目的:
- 可視光でペタヘルツ周波数を解明するためのアット秒計測を実証する.
- 強い光学場に対するシリカの非線形光学極化反応を調査する.
- 光物質のエネルギー伝送の ダイナミクスを把握する
主な方法:
- 電子システムの応答を測定するために,アット秒偏振スペクトロスコーピーを用いた.
- 数サイクル光学フィールド (約. 750 nm) で,高い電場強度 (> 1 V/ Å) が使用された.
- ドライビングレーザーフィールドに対する非線形偏振の30アット秒未満のタイミングが達成されました.
主要な成果:
- ペタヘルツ周波数の光学フィールドに対する 電子反応の解像度
- アット秒非線形偏振と エネルギー移転の時間解明の洞察を提供した.
- 光と電子の間の量化されたエネルギー交換 (可逆的および不可逆的).
- 100THz以上のダイエレクトリック光学スイッチングの実現可能性が実証されている.
- ペタヘルツ帯域幅メトロロジーポテンシャルを示す,サブフェムト秒のエネルギー伝送増加 (>2.5 V/Å) を観測した.
結論:
- アット秒計測は,光学偏振測定をペタヘルツ周波数まで拡張します.
- この研究は,超高速エネルギー交換のダイナミクスを定量的に提供します.
- 結果は,超高速光学スイッチングとペタヘルツ帯域幅メトロロジーの実現可能性を示唆しています.
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