基于堆叠全息光敏聚合物光栅的中子干涉仪
Neutron Interferometers from Stacked Holographic Photopolymer Gratings
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中文总结 AI 辅助
本研究开发出一种基于堆叠全息光敏聚合物光栅的单片双劳厄中子干涉仪，可规避传统中子干涉仪的稳定性问题，能用于观测干涉条纹及原位表征中子束光谱分布，为物质波干涉测量和计量学提供了新平台。
中文摘要 AI 辅助
采用分立光学元件的长波长中子干涉测量因对准和稳定性要求严苛而极具挑战性。本文介绍一种由商用Bayfol HX光敏聚合物膜堆叠制成的单片双劳厄中子干涉仪，通过在多层中同时记录全息光栅，构建出固有对准的坚固装置，规避了传统稳定性问题。我们通过观测可见光和极冷中子衍射强度中的特征干涉条纹，验证了该装置的功能，随后利用该干涉仪对中子束的光谱分布进行原位表征，证明其可作为紧凑型光谱仪使用。本研究确立了堆叠全息光栅作为物质波干涉测量和计量学领域简单、通用且强大的平台的地位。
英文摘要
Long-wavelength neutron interferometry using discrete optical elements is notoriously challenging due to stringent alignment and stability requirements. Here, we introduce a monolithic double-Laue neutron interferometer fabricated from a stack of commercial Bayfol HX photopolymer films. By recording holographic gratings simultaneously in multiple layers, we create a robust device that is inherently aligned, bypassing traditional stability problems. We demonstrate the device's function by observing the characteristic interference fringes in the diffracted intensity of both light and very cold neutrons. The interferometer is then used to perform in-situ characterization of the neutron beam's spectral profile, demonstrating its utility as a compact spectrometer. Our work establishes stacked holographic gratings as a simple, versatile, and powerful platform for matter-wave interferometry and metrology.
