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Proceedings Paper

On the possibility of electron "acousto-optical" modulation.
Author(s): Herman Batelaan; Robert A. Mertens
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Paper Abstract

We have demonstrated electron diffraction from a standing light wave. More recently, we have also demonstrated the onset of Bragg scattering for electrons by a thick standing wave of light. Here, we investigate the use of thick Bragg crystals for the electron analogue of acousto-optical modulators. In atom optics it has been shown both theoretically and experimentally that effects analogous to acousto-optical modulation can be achieved for atoms. Based on this approach we estimate the experimental parameters needed for electrons. It is perhaps surprising that atomic and electron beams with poorly defined energy can be used for diffraction and interferometry. It may also be surprising that we consider modulation at frequencies much smaller than the frequency width of the electron beam as being useful. This contrasts the usual optical application of AOM's as a frequency shifter. For white light interferometers, the use of such modulation promises a greatly improved signal to noise by providing a beatnote in the interference signal at the modulation frequency.

Paper Details

Date Published: 29 September 2005
PDF: 8 pages
Proc. SPIE 5953, Acousto-optics and Photoacoustics, 59530A (29 September 2005); doi: 10.1117/12.622607
Show Author Affiliations
Herman Batelaan, Univ. of Nebraska, Lincoln (United States)
Robert A. Mertens, Univ. of Gent (Belgium)

Published in SPIE Proceedings Vol. 5953:
Acousto-optics and Photoacoustics
Antoni Sliwinski; Rainer Reibold; Vitaly B. Voloshinov, Editor(s)

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