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Broad-Bandwidth Micro-Diffractive Optical Elements
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DOI：10.1002/lpor.202100537.png)
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Abstract
En 中文
Thin, lightweight micro-diffractive optical elements (M-DOEs) are of great significance to integrated optics. However, the narrow working bandwidth of M-DOEs allows them to operate only at specific wavelengths. Existing solutions require multiple components assembly, which is difficult to implement in an integrated system. Here, a general designing and processing scheme of an optofluidic-integrated broad-bandwidth M-DOE is reported, achieving an average diffraction efficiency of over 84% across the entire visible band (406-824 nm). As a proof-of-concept, a wideband operating micro-diffractive lens and orbital angular momentum beam micro-generator are demonstrated. This strategy provides a common protocol for various broad-bandwidth M-DOEs operating in integrated optical systems.
Keywords:
broad-band
high-efficiency
multilayer micro-diffractive optical elements
optofluidic-integrated
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