Speaker
Description
GaAs based nanostructured photocathodes with truncated nano-cones were fabricated and studied at a low voltage test chamber. Quantum Efficiency (QE) enhancement due to dipole resonance mode excitation has been consistently observed throughout the waveband of 530-680 nm compared to the QE of flat bulk GaAs wafers. A modified photocathode activation recipe was followed for negative electron affinity (NEA) activation. In this report, we will present the experimental results from truncated nano-cone region and comparison with the flat region of the photocathode, and the recent study on other important properties of this type of photocathode including lifetime and electron spin polarization (ESP).
*Corresponding Email: mrahm008@odu.edu
Acknowledgment
This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contract DE-AC05-06OR23177.
