Abstract
Laser driven high current density pulsed electron emission is observed from a lead zirconium titanate (PZT, Zr/Ti: 53/47) ferroelectric ceramic disk using second harmonic of neodium: glass laser (wavelength ∼527 nm, pulse duration ∼3 ns, laser fluence ∼5–40 mJ/cm2) in the presence of a dc extraction field. Apart from electron current pulses of ∼100 A/cm2 [full width at half maximum (FWHM) ∼400 ns] obtained from laser irradiation of the surface towards the positive end of the polarization vector, electron current pulses of ∼30 A/cm2 (FWHM ∼1.1 μs) are also emitted from laser irradiation of the opposite surface. Dependencies of various characteristics of the electron pulse on laser fluence in the two configurations are presented.
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