Time-Resolved Electron Holography by Interference Gating

Off-axis electron holography is an established technique for quantitative measurement of electric and magnetic fields. Due to its high sensitivity to the coherency of the electron beam, it requires extended exposure times (typically several seconds) to achieve a sufficient signal-to-noise ratio. We present a simple, yet promising, method for holographic measurements of periodic reversible processes with temporal resolutions in the microsecond regime by means of a gating approach.