Two-photon photoemission from metals induced by picosecond laser pulses

1977/05/15 by J. H. Bechtel, W. Lee Smith, W. L. Smith +1 · 3 citations
Engineering · Physics and Astronomy · #Laser Design and Applications #Laser Material Processing Techniques #Laser-Matter Interactions and Applications

paper · doi:10.1103/physrevb.15.4557

openalex publication_date 1977/05/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We have measured the two-photon photoemission current density from tungsten, tantalum, and molybdenum when irradiated by 532-nm wavelength radiation. This wavelength was produced by the second-harmonic radiation of single picosecond laser pulses from a mode-locked neodymium-doped yttrium-aluminum-garnet laser. The results are interpreted in terms of both a simple temperature-independent two-photon photoemission effect and a generalization of the Fowler-DuBridge theory of photoemission. The laser polarization dependence of the emitted current is also reported.

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