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- W4387641510 endingPage "158668" @default.
- W4387641510 startingPage "158668" @default.
- W4387641510 abstract "Ultrafast laser induced thermionic emission from metal surfaces has several applications. Here, we investigate the role of laser polarization and angle of incidence on the ultrafast thermionic emission process from laser driven gold coated glass surface. The spatio-temporal evolution of electron and lattice temperatures are obtained using an improved three-dimensional (3D) two-temperature model (TTM) which takes into account the 3D laser pulse profile focused obliquely onto the surface. The associated thermionic emission features are described through the modified Richardson-Dushman equation, including dynamic space-charge effects and are included self-consistently in our numerical approach. We show that temperature-dependent reflectivity influences laser energy absorption. The resulting peak electron temperature on the metal surface monotonically increases with the angle of incidence for the P polarization, while for the S polarization it shows the opposite trend. We observe that thermionic emission duration shows a strong dependence on the angle of incidence and contrasting polarization dependent behavior. The duration of the thermionic current shows strong correlation to the intrinsic electron-lattice thermalization time, in a fluence regime well below the damage threshold of gold. The observations and insights have important consequences in designing ultrafast thermionic emitters using a metal based architecture." @default.
- W4387641510 created "2023-10-15" @default.
- W4387641510 creator A5001480706 @default.
- W4387641510 creator A5064409845 @default.
- W4387641510 creator A5070545046 @default.
- W4387641510 creator A5092691973 @default.
- W4387641510 date "2023-10-01" @default.
- W4387641510 modified "2023-10-15" @default.
- W4387641510 title "Tunable ultrafast thermionic emission from femtosecond-laser hot spot on a metal surface by control of laser polarization and angle of incidence: A numerical investigation" @default.
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- W4387641510 doi "https://doi.org/10.1016/j.apsusc.2023.158668" @default.
- W4387641510 hasPublicationYear "2023" @default.
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