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オプトメカニカルシステムにおけるフォノンモードの非相互制御と冷却
H Xu1,2, Luyao Jiang1, A A Clerk3
1Department of Physics, Yale University, New Haven, CT, USA.
Nature
|April 5, 2019
まとめ
機械的共振器の相互性を破る新しい方法を開発し,一方的な音響エネルギーの流れを可能にしました. この革新は,音声装置の調節可能な隔離と熱変動制御を可能にします.
科学分野:
- 量子物理学と音学
- オプトメカニクス
- ナノテクノロジー
背景:
- 機械的共振器は重力波検出器や スマートフォンなどのデバイスに不可欠であり 低分散と調節可能なカップリングを提供します
- 現在のシステムは通常,互換性に従っており,一方的な信号伝播を必要とするアプリケーションを制限しています.
- 既存の非互換性フォノニックデバイスには,強力な非互換性,調節性,コンパクトな統合などの堅牢な動作機能が欠けている.
研究 の 目的:
- 音声共鳴器間の強固な非相互結合を実現するための新しいスキームを導入する.
- 機械的共振器システムにおける音響エネルギーの流れを制御する方法を実証する.
- 熱変動と冷却共鳴器の管理における非相互性の適用を調査する.
主な方法:
- 標準の空洞-光学相互作用を用いて非相互結合を設計する.
- 光学空間に適用されるドライブトーンのフェーズを調整することによって調節可能な隔離を実装します.
- 熱変動に対する非相互効果を分析するために,共振器のダイナミクスを直接監視する.
主要な成果:
- 約30デシベルの 絶え間なく動作する
- ドライブトーン・フェーズによる非互換性の in situ 調節性が実証された.
- 音響振動器の冷却を可能にしました
結論:
- 開発されたオプトメカニカルスキームは,音声共鳴器の頑丈で調節可能で連続した非相互結合を提供します.
- この突破により 性能が向上した 隔離器や循環器のような 高度な音声装置が作れるようになりました
- 熱の変動を制御する能力は,機械的共振器システムにおける冷却と騒音削減のための新しい道を開きます.
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