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Simulated band diagram without polarization for the photocathode device designs with different cap thickness. Inset shows the simulation model of the device.
Simulated band diagram with the effect of polarization included for the photocathode device designs with different cap thickness.
Photoemission spectra for the four photocathode structures with different cap growth time. Inset shows the change in calculated threshold as a function of expected cap thickness.
Change in peak QE as a function of cap thickness.
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