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オンチップのトポロジカルナノ電機メタマテリアルの実験的実現

Jinwoong Cha^1,2, Kun Woo Kim³, Chiara Daraio⁴

¹Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland.

|December 14, 2018

まとめ

研究者らは,シリコンナトリドナノ膜を用いたオンチップのトポロジカルメタマテリアルを作成し,高周波波の輸送を可能にしましたこれらのナノ電気機械システムは欠陥のないシグナル処理を可能にし先進的な音響装置への道を切り開きます

科学分野:

物理学
材料科学
ナノテクノロジー

背景:

高周波の機械システムは故障に敏感で,エネルギー損失と逆分散を引き起こします.
トポロジカル現象は,以前は大規模システムに限定されていた,欠陥免疫と単方向のエネルギー伝播を提供します.
トポロジカルメカニカルシステムのオンチップレベルへのスケーリングは,デバイスアプリケーションにとって極めて重要です.

研究の目的:

高周波の機械波輸送のためのチップ上のトポロジカルなメタマテリアルを実験的に実現する.
エッジ状態と強度を含むこれらの新種のメタマテリアルの性質を実証する.
信号処理における統合された音響コンポーネントの可能性を探求する.

主な方法:

立体ナノ膜の二次元配列の製造
高周波 (10〜20メガヘルツ) で動作する.
エッジ状態,局所化,周波数分散の実験的特徴付け

主要な成果:

チップスケールでトポロジカルなナノ電機メタマテリアルの実現.
局所的なエッジ状態の実験的確認ディラック円のような分散.
波導体による歪みに無感で頑丈で偽回転に依存する輸送装置の実証

結論:

チップ上のトポロジカルメタマテリアルは,シリコンナトリドナノ膜を使用して実現できます.
これらのシステムは重要なトポロジック特性を発揮し,欠陥のない波導体を可能にします.
開発されたコンポーネントは,高周波信号処理における片方向波導体と遅延線に適しています.

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