By taking advantage of low ionization potentials of alkali atoms, we demonstrate terahertz wave generation from cesium and rubidium vapor plasmas with an amplitude nearly one order of magnitude larger than that from nitrogen gas at low pressure (0.02–0.5 Torr). The observed phenomena are explained by the numerical modeling based upon electron tunneling ionization.

Topics
Energy efficiency, Terahertz radiation, Numerical methods, Hyperfine structure, Plasma confinement, Nonlinear optics, Ions and properties, Electron tunneling, Photoionization, Quantum information
© 2014 AIP Publishing LLC.
2014
AIP Publishing LLC
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