Nanodiamond-based nanoparticle-polymer composite gratings with extremely large neutron refractive index modulation

Elhoucine Hadden; Yuko Iso; Atsushi Kume; Koichi Umemoto; Tobias Jenke; Martin Fally; Jürgen Klepp; Yasuo Tomita

doi:10.1117/12.2623661

24 May 2022 Nanodiamond-based nanoparticle-polymer composite gratings with extremely large neutron refractive index modulation

Elhoucine Hadden, Yuko Iso, Atsushi Kume, Koichi Umemoto, Tobias Jenke, Martin Fally, Jürgen Klepp, Yasuo Tomita

Author Affiliations +

Proceedings Volume 12151, Photosensitive Materials and their Applications II; 1215109 (2022) https://doi.org/10.1117/12.2623661
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Abstract

We report our latest results on holographic gratings based on nanoparticle-polymer composites (NPC) including nanodiamonds with large refractive index modulation amplitude for cold and very cold neutrons (1 nm < λ < 10 nm). Diamond has the best combined neutron optical properties: high coherent scattering length, low incoherent scattering and low absorption. These unique properties allowed us to create phase gratings with large refractive index modulation, high thermal and mechanical stability, and also exhibiting large area holograms compared to NPC gratings incorporating other types of nanoparticles. We discuss the measured light and neutron diffraction properties of nanodiamond NPC gratings. It is shown that the NPC gratings exhibit extremely large scattering length density modulation amplitudes and as a result high diffraction efficiencies for cold and very-cold neutrons. We also discuss possible applications of nanodiamond NPC gratings in neutron optics.

Citation Download Citation

Elhoucine Hadden, Yuko Iso, Atsushi Kume, Koichi Umemoto, Tobias Jenke, Martin Fally, Jürgen Klepp, and Yasuo Tomita "Nanodiamond-based nanoparticle-polymer composite gratings with extremely large neutron refractive index modulation", Proc. SPIE 12151, Photosensitive Materials and their Applications II, 1215109 (24 May 2022); https://doi.org/10.1117/12.2623661

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