光学的なフーリエ面

Nolan Lassaline¹, Raphael Brechbühler¹, Sander J W Vonk^1,2

¹Optical Materials Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland.

Nature

|June 26, 2020

まとめ

研究者らは連続的な深度制御で複雑な光学表面を作る新しい方法を開発しましたこの突破により光の精密な操作が可能になり屈折光学の設計と製造の限界を克服しました

科学分野:

光学と光学
材料科学
ナノテクノロジー

背景:

分散光学は格子やホログラムのように光を制御するパターンの表面を使います
現在の製造方法は,表面プロフィールの複雑さを制限し,高度な光学設計を妨げています.
フーリエ光学は difrractive 表面の設計のための数学的枠組みを提供しているが,製造の課題に直面している.

研究の目的:

分散光学と現在の製造制限の数学的な設計の不一致を克服する.
任意の数の指定されたシナソイドコンポーネントを持つ光学表面を作成する方法を実証する.
これまでに実現できなかった複雑な光学面の製造を可能にします

主な方法:

熱スキャニング・プローブ・リトグラフィーとテンプレート・テクニックの組み合わせ
連続した深度制御とサブ波長の解像度を持つ周期的および非周期的な表面パターンを作成します.
電子磁気信号のフーリエスペクトル工学のための多コンポーネント線形格子を使用する.

主要な成果:

任意の数の指定サイヌソイドを持つ光学表面を成功裏に製造した.
赤,緑,青の光を同時に同じインシデンス角度で結合する超薄格子を示した.
分析的に設計され,複雑な2Dモエールパターン,準結晶,ホログラムを正確に複製した.

結論:

開発されたアプローチは,複雑な屈折光学のための設計製造不一致を排除します.
この方法によりバイオセンサやレーザー,メタ表面などの新しい光学デバイスの可能性が生まれます
この技術は,トポロジック構造やバレートロニクスなどの新興光子領域の進歩を容易にする.

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