全光通信帯域の例外点の周りの時間非対称ループ
Jae Woong Yoon1,2, Youngsun Choi1, Choloong Hahn3
1Department of Physics, Hanyang University, Seoul, South Korea.
Nature
|September 19, 2018
まとめ
研究者らは,強固なシリコン光子装置を実証し,例外的なポイントの周りに時間非対称な光の伝達を示しています. この画期的な進歩により ブロードバンドのオンチップ光学装置が 単離器やモードコンバーターなどの用途に 対応できるようになりました
科学分野:
- * 物理,特に非ヘルミシアンとトポロジックフォトニクス
- * オープンシステムのダイナミクスと異常な物理現象の探索
背景:
- * 非ヘルミジアン系における例外点 (EP) は,堅固なオープンシステムのダイナミクスを提供します.
- * 従来のヘルミシアンダイナミクスは,EPのキラル現象と対照的です.
- 応用のための技術プラットフォームに EP を実現することは,重要な課題です.
研究 の 目的:
- * 非ヘルミシアン型トポロジ的演算のための堅固なシリコン光子構造を実験的に実証する.
- * 光学領域の例外的な点の周りに時間非対称な光の伝送を実現する.
- * ブロードバンドオンチップ光学デバイスと実用的なアプリケーションの可能性を調査する.
主な方法:
- * 二つの結合したシリコンチャネル波導体によるシリコン光子構造の製造.
- * 非ハーミルトン式を制御するスレブ波導体漏れ放射シンクの統合.
- EPの周りの時間非対称なループを通して光子モードの伝送の実験的実証.
主要な成果:
- * シリコンフォトニック構造で強固な時間非対称な光伝送を達成した.
- *非常に広いスペクトル帯 (1.261.675 μm) で動作が実証され,光通信窓全体をカバーしています.
- * デバイスアーキテクチャによる非ヘルミシアンハミルトニアンの正確な制御を確認しました.
結論:
- * 非ヘルミシアントポロジックダイナミクスに基づくブロードバンドオンチップ光学デバイスのための半導体プラットフォームを確立しました.
- オンチップの光学分離器や非互換モード変換器などの実用的な応用への道を開いた.
- * 様々な科学分野における非ヘルミシアン波動学の技術的関連性を強調した.
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