コロイド性鉛ハリドペロブスキート量子ドットからの一貫した単光子放射
Hendrik Utzat1, Weiwei Sun1, Alexander E K Kaplan1
1Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA.
Science (New York, N.Y.)
|February 23, 2019
まとめ
コロイド半導体量子ドット,特に鉛ハリドペロブスキート量子ドット (PQD) は,高度に一貫した単光子放射を示します. この画期的な発見は 量子光学の応用や 絡み合った光子の源を 開発する道を開きます
科学分野:
- 量子光学
- 材料科学
- 固体物理学
背景:
- コロイド半導体量子ドットは 調節性とスケーラビリティにより 量子光学にとって有望である.
- 歴史的に,それらの適用は,重要な排出の不一致によって制限されています.
研究 の 目的:
- 個々のコロイド鉛ハリドペロブスキート量子ドット (PQD) の光学一致性特性を調査する.
- 量子光学デバイスの構成要素としてのPQDの可能性を評価する.
主な方法:
- 化学合成コロイド鉛ハリドペロブスキート量子ドットの製造.
- 個々のPQDの光学コヘランス時間と放射寿命を含む単光子放射特性の測定.
主要な成果:
- 個々のPQDは,非常に効率的な単光子放射を示しています.
- 最大80ピコ秒の光学コヒーレンス時間が観測され,これは210ピコ秒の放射寿命の相当な部分を表しています.
- これらの発見は,以前のコロイド量子ドットと比較して,有意に減少した放射不一致を示しています.
結論:
- PQDは優れた光学相関性を示し,量子光学アプリケーションに適しています.
- PQDは,区別がつかない単一の光子と絡み合った光子ペアのソースを作成するための有効な候補です.
- これらの結果は,高速発射,スペクトル調節性,スケーラビリティなどの望ましい性質を持つペロブスキートベースの量子エミターの設計のための基盤を提供します.
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