Laser-Induced Ion Formation and Electron Emission from a Nanostructured Gold Surface at Laser Fluence below the Threshold for Plasma Formation
Andrey Pento,
Ilya Kuzmin,
Viacheslav Kozlovskiy,
Lei Li,
Polina Laptinskaya,
Yaroslav Simanovsky,
Boris Sartakov,
Sergey Nikiforov
Affiliations
Andrey Pento
Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991 Moscow, Russia
Ilya Kuzmin
Vernadsky Institute of Geochemistry and Analytical Chemistry of the Russian Academy of Sciences, 119991 Moscow, Russia
Viacheslav Kozlovskiy
Chernogolovka Branch of the N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Chernogolovka, 142432 Moscow Region, Russia
Lei Li
Institute of Mass Spectrometry and Atmospheric Environment, Jinan University, Guangzhou 510632, China
Polina Laptinskaya
Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991 Moscow, Russia
Yaroslav Simanovsky
Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991 Moscow, Russia
Boris Sartakov
Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991 Moscow, Russia
Sergey Nikiforov
Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991 Moscow, Russia
The laser formation of positive and negative ions on a nanostructured metal surface is observed at laser fluence below the plasma formation threshold. The laser radiation energy dependences of the yield of positive and negative Au ions and charged clusters as well as electrons from the laser-induced nanostructures on the surface of gold are obtained at laser fluence below the plasma formation threshold using a pulsed laser with a wavelength of 355 nm and a pulse duration of 0.37 ns. It is shown that the ratio of the signals of positive and negative ions is constant over the entire range of the laser radiation energies, while the ion signal dependence on the laser radiation energy is described by a power function with an exponent of 9. The role of gold nanoparticles with a size of less than 5 nm in the formation of Au ions and charged Au clusters is discussed.
