A nanofabricated, monolithic, path-separated electron interferometer

Abstract Progress in nanofabrication technology has enabled the development of numerous electron optic elements for enhancing image contrast and manipulating electron wave functions. Here, we describe a modular, self-aligned, amplitude-division electron interferometer in a conventional transmission...

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Autores principales:	Akshay Agarwal, Chung-Soo Kim, Richard Hobbs, Dirk van Dyck, Karl K. Berggren
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/71197d48710b417589fb896b6232a5ff
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spelling	oai:doaj.org-article:71197d48710b417589fb896b6232a5ff2021-12-02T11:40:43ZA nanofabricated, monolithic, path-separated electron interferometer10.1038/s41598-017-01466-02045-2322https://doaj.org/article/71197d48710b417589fb896b6232a5ff2017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01466-0https://doaj.org/toc/2045-2322Abstract Progress in nanofabrication technology has enabled the development of numerous electron optic elements for enhancing image contrast and manipulating electron wave functions. Here, we describe a modular, self-aligned, amplitude-division electron interferometer in a conventional transmission electron microscope. The interferometer consists of two 45-nm-thick silicon layers separated by 20 μm. This interferometer is fabricated from a single-crystal silicon cantilever on a transmission electron microscope grid by gallium focused-ion-beam milling. Using this interferometer, we obtain interference fringes in a Mach-Zehnder geometry in an unmodified 200 kV transmission electron microscope. The fringes have a period of 0.32 nm, which corresponds to the [1̄1̄1] lattice planes of silicon, and a maximum contrast of 15%. We use convergent-beam electron diffraction to quantify grating alignment and coherence. This design can potentially be scaled to millimeter-scale, and used in electron holography. It could also be applied to perform fundamental physics experiments, such as interaction-free measurement with electrons.Akshay AgarwalChung-Soo KimRichard HobbsDirk van DyckKarl K. BerggrenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Akshay Agarwal Chung-Soo Kim Richard Hobbs Dirk van Dyck Karl K. Berggren A nanofabricated, monolithic, path-separated electron interferometer
description	Abstract Progress in nanofabrication technology has enabled the development of numerous electron optic elements for enhancing image contrast and manipulating electron wave functions. Here, we describe a modular, self-aligned, amplitude-division electron interferometer in a conventional transmission electron microscope. The interferometer consists of two 45-nm-thick silicon layers separated by 20 μm. This interferometer is fabricated from a single-crystal silicon cantilever on a transmission electron microscope grid by gallium focused-ion-beam milling. Using this interferometer, we obtain interference fringes in a Mach-Zehnder geometry in an unmodified 200 kV transmission electron microscope. The fringes have a period of 0.32 nm, which corresponds to the [1̄1̄1] lattice planes of silicon, and a maximum contrast of 15%. We use convergent-beam electron diffraction to quantify grating alignment and coherence. This design can potentially be scaled to millimeter-scale, and used in electron holography. It could also be applied to perform fundamental physics experiments, such as interaction-free measurement with electrons.
format	article
author	Akshay Agarwal Chung-Soo Kim Richard Hobbs Dirk van Dyck Karl K. Berggren
author_facet	Akshay Agarwal Chung-Soo Kim Richard Hobbs Dirk van Dyck Karl K. Berggren
author_sort	Akshay Agarwal
title	A nanofabricated, monolithic, path-separated electron interferometer
title_short	A nanofabricated, monolithic, path-separated electron interferometer
title_full	A nanofabricated, monolithic, path-separated electron interferometer
title_fullStr	A nanofabricated, monolithic, path-separated electron interferometer
title_full_unstemmed	A nanofabricated, monolithic, path-separated electron interferometer
title_sort	nanofabricated, monolithic, path-separated electron interferometer
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/71197d48710b417589fb896b6232a5ff
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A nanofabricated, monolithic, path-separated electron interferometer

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