Simulating surface femtochemistry: coverage dependence of laser-induced desorption of CO from copper surfaces

Clayton Springer; Martin Head-Gordon

doi:10.1117/12.221467

25 September 1995 Simulating surface femtochemistry: coverage dependence of laser-induced desorption of CO from copper surfaces

Clayton Springer, Martin Head-Gordon

Author Affiliations +

Proceedings Volume 2547, Laser Techniques for Surface Science II; (1995) https://doi.org/10.1117/12.221467
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

The method of molecular dynamics with electronic frictions is employed to simulate femtosecond laser induced desorption of CO from Cu(100), at an initial surface temperature of 95 K. The effect of adsorbate coverage is assessed by comparing simulations at low coverage, and 0.5 ML coverage. For desorption due to a single 100 fs laser pulse, a significant enhancement of desorption yield due to overlayer coverage is obtained, particularly at the highest laser fluence considered (60 J m^-2). The origin of this coverage dependence is discussed. Additionally, the simulations are reported in which the exciting laser pulse is split into two components, separated by a variable time delay.

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Clayton Springer and Martin Head-Gordon "Simulating surface femtochemistry: coverage dependence of laser-induced desorption of CO from copper surfaces", Proc. SPIE 2547, Laser Techniques for Surface Science II, (25 September 1995); https://doi.org/10.1117/12.221467

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