Regular Article

New experiments with a double crystal electron interferometer^*

¹ Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons (ER-C) and Peter Grünberg Institute (PGI), Forschungszentrum Jülich, 52425 Jülich, Germany
² School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore
³ CNR-Institute of Nanoscience-S3, Via G. Campi 213/a, 41125 Modena, Italy
⁴ CNR-IMEM, Parco delle Scienze 37a, 43100 Parma, Italy
⁵ Department of Physics and Astronomy, University of Bologna, Viale B. Pichat 6/2, 40127 Bologna, Italy

^a e-mail: mduchamp@ntu.edu.sg

Received: 21 October 2016
Revised: 2 February 2017
Accepted: 29 March 2017
Published online: 28 April 2017

Abstract

Recent advances in transmission electron microscopy and specimen preparation now permit the revival of an old idea, originally pioneered by Marton, of using single crystals as amplitude division beam splitters. As a first step in the direction of realizing a three crystal electron interferometer, we present results obtained from a double crystal interferometer, in which the gap between the two crystals is under experimental control and perfect registry is obtained by using focused ion beam milling to fabricate the interferometer from a single Si crystal.