低損失プラズモンの電光調節器
Christian Haffner1, Daniel Chelladurai2, Yuriy Fedoryshyn2
1ETH Zurich, Institute of Electromagnetic Fields (IEF), Zurich, Switzerland. haffnerc@ethz.ch.
Nature
|April 27, 2018
まとめ
研究者はプラズモンの損失を バイパスし,共振スイッチングを用いて より速く,より小さな光学装置を可能にしました この画期的な発見は 感知と通信における プラズモニクスの大きな障害を克服しました
科学分野:
- プラズモニック
- ナノフォトニクス
- 光学装置の工学
背景:
- プラズモニクスは,金属表面上の電子の動きと光物質の相互作用の研究であり,長らくサブ波長光学装置を狙っていました.
- 電子の動きによるオームの損失は熱を生成し,センサーと情報技術におけるプラズモンの応用を制限する.
- プラズモニクスには 損失が大きすぎると考えられていました
研究 の 目的:
- プラズモニックデバイスのオーム損失の限界を克服するために
- プラズモニックシステムでの熱生成を回避するための新しい方法を実証する.
- 先進的なアプリケーションのための実用的な亜波長光学装置を実現する.
主な方法:
- 負面な表面のプラズモンのポラリトンへの光結合を制御するために"共振スイッチ"を導入した.
- "オン"状態 (共鳴外) の光結合を防ぐために破壊的干渉を利用した.
- このアプローチを検証するためにプラズモンの電気光学リング変調器を製造し,テストした.
主要な成果:
- 音響スイッチを通してオームの損失を回避することが示されています.
- サブピコ秒のスイッチングでオンとオフ状態の間の大きな絶滅比を達成しました.
- 実験的検証により,チップ内での光学損失が低く,高速動作 (> 100 GHz),エネルギー効率,および熱安定性が確認されました.
結論:
- プラズモニックは,損失を軽減することによって,高性能アプリケーションに実用的です.
- 共振スイッチング技術は,高速でコンパクトなオンチップセンサーと通信技術の開発を可能にします.
- この研究は,プラズモニクスを将来の情報とセンシングプラットフォームに統合するための新しい道を開きます.
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