Properties of hydrogen terminated diamond as a photocathode
Physical Review Letters
Electron emission from the negative electron affinity (NEA) surface of hydrogen terminated, boron doped diamond in the  orientation is investigated using angle resolved photoemission spectroscopy (ARPES). ARPES measurements using 16AAeV synchrotron and 6AAeV laser light are compared and found to show a catastrophic failure of the sudden approximation. While the high energy photoemission is found to yield little information regarding the NEA, low energy laser ARPES reveals for the first time that the NEA results from a novel Franck-Condon mechanism coupling electrons in the conduction band to the vacuum. The result opens the door to the development of a new class of NEA electron emitter based on this effect. © 2011 American Physical Society.
Department of Physics
Original Publication Date
DOI of published version
Rameau, J. D.; Smedley, J.; Muller, E. M.; Kidd, T. E.; and Johnson, P. D., "Properties of hydrogen terminated diamond as a photocathode" (2011). Faculty Publications. 1959.