室温9μm波長の光検出器とGHz周波数のヘテロダイン受信機
Daniele Palaferri1, Yanko Todorov1, Azzurra Bigioli1
1Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Diderot, Sorbonne Paris Cité, CNRS-UMS 7162, 75013 Paris, France.
Nature
|March 27, 2018
まとめ
研究者らは室温で動作する メタマテリアルを用いた 新しい赤外線光検出器を開発しました この画期的な発見は 暗流の課題を克服し 高速で敏感な熱画像と 冷却なしでデータ転送を可能にします
科学分野:
- 光電子機器
- メタマテリアル
- 赤外線技術
背景:
- 費用対効果の高い光電子機器には,室温での操作が不可欠です.
- 現在の半導体光検出器は,室温でダーク電流と闘い,低温でのアプリケーションを制限します.
- 高感度と速度は,これらの装置の高温操作と相容れない.
研究 の 目的:
- 室温の赤外線光検出器の性能を向上させるため
- 高温でダーク電流と物質の性質の限界を克服するために
- 様々な用途で高速で高感度な赤外線検出を可能にします.
主な方法:
- 亜波長金属共振器を備えたメタマテリアルの使用による長波長赤外線量子洞光検出器の製造.
- 暗い電流を減らすために,電気領域に相対的に大きな光子収集領域を使用します.
- 高温で物質の固有の限界を克服するために 光学的なアーキテクチャを使用します
主要な成果:
- メタマテリアルの光検出器は,室温までの性能を大幅に向上させました.
- ダーク電流は 装置の設計により 大幅に減少しました
- 検出器は,ヘテロダイン受信機として使用されたとき,4ギガヘルツ (GHz) 以上の高周波数信号を達成しました.
- 室温で高速で動作できるように
結論:
- 開発されたブロードバンドの冷却されていない光検出器は,最新の技術よりも著しい進歩を遂げています.
- この技術は,高速 (ギガビット/秒) のデータ転送と高精度分子スペクトロスコーピーを可能にします.
- この装置は,室温で動作する低コストのコンパクトな熱画像とセンシングシステムの道を開きます.
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