Rb adsorbate-induced negative electron affinity on quartz

30th International Conference on Photonic, Electronic, and Atomic Collisions

Sedlacek, J.A.^1 ; Kim, E.^2 ; Rittenhouse, S.T.^3,4 ; Weck, P.F.^5 ; Sadeghpour, H.R.^6 ; Shaffer, J.P.^1

Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman

OK

73019, United States^1

Department of Physics and Astronomy, University of Nevada Las Vegas, Las Vegas

NV

89154, United States^2

Department of Physics and Astronomy, Western Washington University, Bellingham

WA

98225, United States^3

Department of Physics, United States Naval Academy, Annapolis

MD

21402, United States^4

Sandia National Laboratories, P.O. Box 5800, Albuquerque

NM

87185-0779, United States^5

ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge

MA

02138, United States^6

关键词: Electromagnetically-induced transparency;    Fundamental studies;    Low energy electrons;    Negative electron affinity;    Quantum system;    Quartz surfaces;    Rydberg atoms;    Surface interactions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/875/12/112014/pdf
DOI  :  10.1088/1742-6596/875/12/112014

来源: IOP

【 摘 要 】

We have investigated Rb adsorbates on the SiO2(0001) surface. Using Rydberg atom electromagnetically induced transparency, we investigate the electric fields resulting from Rb adsorbed on the quartz surface, and measure the activation energy of the Rb adsorbates. We show that the adsorbed Rb induces a negative electron affinity (NEA) on the quartz surface. The NEA surface allows low energy electrons to bind to the surface and cancel the electric field from the Rb adsorbates. Our results are important for integrating Rydberg atoms into hybrid quantum systems and the fundamental study of atom-surface interactions, as well as applications for electrons bound to a surface.