On the possibility of electron "acousto-optical" modulation.

Herman Batelaan; Robert A. Mertens

doi:10.1117/12.622607

29 September 2005 On the possibility of electron "acousto-optical" modulation.

Herman Batelaan, Robert A. Mertens

Proceedings Volume 5953, Acousto-optics and Photoacoustics; 59530A (2005) https://doi.org/10.1117/12.622607
Event: Congress on Optics and Optoelectronics, 2005, Warsaw, Poland

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.

Citation Download Citation

Herman Batelaan and Robert A. Mertens "On the possibility of electron "acousto-optical" modulation.", Proc. SPIE 5953, Acousto-optics and Photoacoustics, 59530A (29 September 2005); https://doi.org/10.1117/12.622607

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