Abstract
A dc hot thermal and an ac-modulated cold slow potassium beam copropagate and pass through an atom de Broglie–wave interferometer, consisting of a sequence of three microfabricated diffraction gratings. Talbot-vonLau interference fringes are formed and sensed by measuring transmission with a hot wire as a function of grating position. The hot beam produces diffraction-limited shadow Moiré fringes, while the longer de Broglie wavelength slow beam produces interference fringes with high visibility at the fifth and sixth spatial harmonics of the shadow Moiré fringes.
- Received 30 August 1993
DOI:https://doi.org/10.1103/PhysRevA.49.R2213
©1994 American Physical Society