Evidence of vectorial photoelectric effect on Copper

Details Evidence of vectorial photoelectric effect on Copper Evidence of vectorial photoelectric effect on Copper

2012-01-14

arxiv.org/abs/1201.3046v1

Appl. Phys. Lett. 87, 081112 (2005)

Physics

Condensed Matter

Materials Science

3 pages, 3 figures

Scientific paper

10.1063/1.2031949

Quantum Efficiency (QE) measurements of single photon photoemission from a Cu(111) single crystal and a Cu polycrystal photocathodes, irradiated by 150 fs-6.28 eV laser pulses, are reported over a broad range of incidence angle, both in s and p polarizations. The maximum QE (\simeq 4\times10^{-4}) for polycrystalline Cu is obtained in p polarization at an angle of incidence {\theta} = 65deg. We observe a QE enhancement in p polarization which can not be explained in terms of optical absorption, a phenomenon known as vectorial photoelectric effect. Issues concerning surface roughness and symmetry considerations are addressed. An explanation in terms of non local conductivity tensor is proposed.

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