可視範囲のプラズモニクスのための二次元ボロンポリモルフ:第一原理の探求
Yuefei Huang1, Sharmila N Shirodkar1, Boris I Yakobson1
1Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States.
Journal of the American Chemical Society
|November 2, 2017
まとめ
ボロフェンは新しい2D材料で,高い電子濃度によりユニークなプラズモニック特性を示しています. これらのプラズモンは,ドーピングを必要とせずに,可視スペクトルでも高い周波数で動作します.
科学分野:
- 材料科学
- 凝縮物質物理学
- ナノテクノロジー
背景:
- 二次元 (2D) 材料はユニークな電子特性を提供します.
- ボロフェンは,最近発見された2Dボロンアロトロップで,金属の特徴を示しています.
- ボロフェンの高い自由電荷キャリア濃度は,プラズモンの行動の可能性を示唆する.
研究 の 目的:
- ボロフェンのプラズモニック特性を調べるため
- ボロフェン構造におけるプラズモンの周波数と分散関係を計算する.
- ナノプラズモンの応用におけるボロフェンの可能性を調査する.
主な方法:
- ダイエレクトリック関数の Ab initio 線形応答計算
- 選択されたボロフェン構造のプラズモン周波数 (ω) の計算.
- 小波ベクトル (q) 限界におけるプラズモンの分散の分析.
主要な成果:
- ボロフェンの電子は2Dの電子ガスのように振る舞う.
- プラズモンの分散は,予測された ω √q 依存性に従う.
- 鈍化していないプラズモンの周波数は,近赤外線と可視領域に広がります.
結論:
- ボロフェンはドーピングなしで高周波で2Dプラズモンをサポートする最初の材料です.
- ボロフェンの金属性およびアニソトロピーの調節性は,プラズモンの微調整行動を可能にします.
- ボロフェンはナノプラズモニクスの応用において有望である.
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