Polarization and Charge Limit Studies of Strained GaAs Photocathodes [Thesis]

Abstract

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A comprehensive evaluation of factors that influence the spin polarization of electrons emitted from bulk GaAs photocathodes

“…A broadly tunable super-continuum light source (NKT Photonics) provided up to milli-Watts of output power over wavelength range from 500 to 850 nm. The wavelength tunable light source emits picosecond pulses: light at low average power (~𝜇𝑊) was used to measure QE and ESP to avoid photoemission in a surface-charge-limited regime 33,34 .…”