フォトニック・トポロジック・アンダーソン・アイソレーター
Simon Stützer1, Yonatan Plotnik2, Yaakov Lumer3
1Institute for Physics, Rostock University, Rostock, Germany.
Nature
|August 24, 2018
まとめ
混乱は驚くほど保護されたエッジ状態を生み出し,トポロジカルなアンダーソン隔離器の輸送を強化します. この研究は,この現象を光子系で実験的に実証し,障害効果の伝統的な理解を逆転させました.
科学分野:
- 凝縮物質物理学
- 光学について
- トポロジカルな材料
背景:
- 2次元のトポロジカル隔離器は,保護されたエッジ状態により,堅固な量子化トランスポートを示します.
- 強い障害は通常,バンドギャップを閉じ,アンダーソンの局所化と輸送の消失につながります.
- トポロジカル・アンダーソン分離器は,乱れがトポロジカル・フェーズと保護されたトランスポートを誘導することを提案する.
研究 の 目的:
- トポロジカルなアンダーソン分離器の存在を実験的に証明する.
- フォトン系におけるトポロジカル・フェーズ誘導における障害の役割を調査する.
主な方法:
- 蜂の巣の幾何学的な形状でヘリコプター状の波導体配列を用いる.
- 波導体の屈折率のランダムな変化によって 現場での障害を導入する.
主要な成果:
- 乱れが加わると トポロジカルな段階へと移行した.
- 保護されたエッジ状態と強化された輸送の出現の実験的証拠が観察されました.
- この光子系における輸送を阻害するのではなく誘導することが示された.
結論:
- トポロジカルなシステムを トポロジカルな段階に 追い込むことができます
- この研究は,光学トポロジックアンダーソン絶縁体の最初の実験的実現を提供します.
- この発見は 乱雑が 輸送を向上させることを示すことで 従来の理解に挑戦しています
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