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CMOS対応 (001) シリコンの波導体光検出器を搭載したインアス量子ドットレーザーの単体統合
Wenkang Zhan1,2, Chao Shen1,2, Lizhi Wang1,2
1State Key Laboratory of Optoelectronic Materials and Devices, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China.
Nano letters
|February 13, 2026
まとめ
シリコン上でInAs量子ドットレーザーダイオード (LD) と波導体光検出器 (WPD) の単体統合を達成しました. このブレークスルーにより,コンパクトな光学集積回路のオンチップ電力モニタリングが可能になる.
科学分野:
- フォトニクス フォトニクスとは
- 材料科学 材料科学とは
- 電気工学 電気工学とは
背景:
- シリコンフォトニクスは,CMOS技術と互換性のある効率的なオンチップレーザーダイオード (LD) と低騒音光検出器 (PD) を要求しています.
- モノリシック・インテグレーションは,光子統合回路 (PIC) の進歩の鍵です.
研究 の 目的:
- InAs量子ドットレーザーダイオード (LD) と波導体光検出器 (WPD) の単体統合をCMOS互換のシリコンプラットフォームで実証する.
- コンパクトPIC用のLDとWPDの正確な位置付けと隔離のための戦略を開発する.
主な方法:
- InAsの量子ドットLDと (001) シリコンの波導体PDの両方に同一の表軸構造を使用しました.
- LDとWPDのコンポーネントを分離するために,XEF2-アシストされたフォーカスイオンビーム・トレンチングを使用しました.
- 統合されたレーザーダイオードと光検出器システムの性能を特徴づけた.
主要な成果:
- LDでは170A/cm2の低値電流密度,WPDでは1Vで4.9×10−5A/cm2の低ダーク電流密度を達成しました.
- LDから48mWの単面連続波出力と,WPDの幅広いO帯域スペクトル応答を実証しました.
- LDの出力電力とWPDの光電流の間の明確な相関が観察され,推定応答度は0.118A/Wであった.
結論:
- シリコン上のInAs QD LDとWPDの単体統合は実現可能である.
- このアプローチにより,コンパクトで高密度の光子統合に不可欠なオンチップ電力モニタリングが可能になります.
- 開発された戦略は,信頼性の高い小型化されたフォトニックデバイスを作成するのに理想的です.
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