THz以下周波数のための冷凍連続波光学スペクトロメーター
L Rogić1, N Somun1, S Griffitt1,2
1Department of Physics, Faculty of Science, University of Zagreb, Bijenička 32, HR-10000 Zagreb, Croatia.
The Review of scientific instruments
|August 26, 2025
まとめ
感度が高い光学スペクトロメーターを 開発しました ミリメートル波の周波数 (50-1000GHz) で 感度が高い温度で 感度が高い光学スペクトロメーターを 開発しました この装置は,反射性の高い材料でも正確な吸収測定を可能にし,磁気特性を研究するのに理想的です.
科学分野:
- 物理学
- スペクトロスコーピー
- 材料科学
背景:
- ミリメートル波のスペクトロスコピーは 材料の特徴,特に磁気および電子特性を決定的に重要です.
- 既存の計器は,特に冷凍温度では,感度,ダイナミックレンジ,および動作条件の制限に直面することが多い.
研究 の 目的:
- ミリメートル波周波数 (50-1000GHz) の新型,高感度連続波光学スペクトロメーターの設計と発表.
- 測定能力を向上させるため,冷凍温度で最適な性能を達成します.
- 高い反射率を含む幅広い材料の正確な吸収係数測定を可能にします.
主な方法:
- 幅広い周波数スペクトルにわたるミリ波放射を生成するために,近赤外線の光混合を使用します.
- 試料の温度を直接測定することによって光学電力吸収を決定します.
- 液体ヘリウム温度を含む冷凍温度での最適な性能のために設計されています.
主要な成果:
- 吸収係数のダイナミックレンジは,冷凍温度で最大10^6に達する.
- 非常に反射するサンプルでの測定に適していることを示します.
- YTiO3における鉄磁共鳴,参照化合物の電子スピン共鳴,およびヴァン・デル・ワールズの磁気材料における反鉄磁共鳴を測定することによって,性能を検証した.
結論:
- 開発された光学スペクトロメーターは,冷凍温度でのミリ波測定に前例のない感度とダイナミックレンジを提供します.
- この装置は多用途で,様々な磁気材料に適用でき,高磁場環境と互換性があります.
- この技術は,磁気共鳴の詳細な特徴づけを可能にすることで,凝縮物質物理学と材料科学の研究を進めています.
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