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Li RK, To H, Andonian G, et al. Surface-plasmon resonance-enhanced multiphoton emission of high-brightness electron beams from a nanostructured copper cathode. Phys Rev Lett. 2013;110(7):074801doi: 10.1103/PhysRevLett.110.074801.
Li, R. K., To, H., Andonian, G., Feng, J., Polyakov, A., Scoby, C. M., Thompson, K., Wan, W., Padmore, H. A., & Musumeci, P. (2013). Surface-plasmon resonance-enhanced multiphoton emission of high-brightness electron beams from a nanostructured copper cathode. Physical review letters, 110(7), 074801. https://doi.org/10.1103/PhysRevLett.110.074801
Li, R K, et al. "Surface-plasmon resonance-enhanced multiphoton emission of high-brightness electron beams from a nanostructured copper cathode." Physical review letters vol. 110,7 (2013): 074801. doi: https://doi.org/10.1103/PhysRevLett.110.074801
Li RK, To H, Andonian G, Feng J, Polyakov A, Scoby CM, Thompson K, Wan W, Padmore HA, Musumeci P. Surface-plasmon resonance-enhanced multiphoton emission of high-brightness electron beams from a nanostructured copper cathode. Phys Rev Lett. 2013 Feb 15;110(7):074801. doi: 10.1103/PhysRevLett.110.074801. Epub 2013 Feb 11. PMID: 25166375.
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Phys Rev Lett. 2013 Feb 15;110(7):074801. doi: 10.1103/PhysRevLett.110.074801. Epub 2013 Feb 11.

Surface-plasmon resonance-enhanced multiphoton emission of high-brightness electron beams from a nanostructured copper cathode.

Physical review letters

R K Li, H To, G Andonian, J Feng, A Polyakov, C M Scoby, K Thompson, W Wan, H A Padmore, P Musumeci

Affiliations

  1. Department of Physics and Astronomy, UCLA, Los Angeles, California 90095, USA.
  2. Advanced Light Source Division, LBNL, Berkeley, California 94720, USA.

PMID: 25166375 DOI: 10.1103/PhysRevLett.110.074801

Abstract

We experimentally investigate surface-plasmon assisted photoemission to enhance the efficiency of metallic photocathodes for high-brightness electron sources. A nanohole array-based copper surface was designed to exhibit a plasmonic response at 800 nm, fabricated using the focused ion beam milling technique, optically characterized and tested as a photocathode in a high power radio frequency photoinjector. Because of the larger absorption and localization of the optical field intensity, the charge yield observed under ultrashort laser pulse illumination is increased by more than 100 times compared to a flat surface. We also present the first beam characterization results (intrinsic emittance and bunch length) from a nanostructured photocathode.

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