Novel Plasmonic Photocathodes for Electron-Ion Colliders
- College of William and Mary, Williamsburg, VA (United States)
Our aim was to explore new photocathode materials and schemes to develop strategies and technologies for next generation nuclear physics accelerator capabilities, particularly for Electron Ion Colliders (EIC). We successfully implemented an experimental setup for light incidence at an acute angle onto metallic photocathodes in UHV, in order to excite surface Plasmon resonance, hence increasing light absorption by the metallic surface and tested the photoemitted current. We successfully tested the setup with a hot cathode as well as Plasmonic silver-MgO samples and obtained excellent results. We extended our studies to shorter wavelengths to help defeat the work function of the metal. We also used oblique incidence thin film deposition onto gratings to achieve optimized Plasmonic excitation leading to stronger EM field and also lower emittance. We tested and used adequate software to model our samples and simulate our experimental results. We incorporated the concept of Fano resonances applied to gratings to better interpret our experimental results.
- Research Organization:
- College of William and Mary, Williamsburg, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- DOE Contract Number:
- SC0012182
- OSTI ID:
- 1364407
- Report Number(s):
- DOE-CWM-SC-0012182
- Resource Relation:
- Related Information: Tailored Fano resonance and localized electromagnetic field enhancement in Ag gratings, by Zhaozhu Li, J. Michael Klopf, Lei Wang, Kaida Yang & Rosa A. Lukaszew, Scientific Reports 7, Article number: 44335 (2017)
- Country of Publication:
- United States
- Language:
- English
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