Excitation by Crossed Waves

The experimental setup for studying gas-surface scattering under those conditions implements a truncated prism to allow normal incidence of one of the beams onto the interface, as well as excitation of an EW with the other beam. In the experimental realization (Bordo et al. 2001) continuous wave lasers excited two adjacent transitions in Na atoms. In one excitation geometry (the normal configuration ), the pump laser beam resonant to the 

3Si/2 3P3/2 transition excited a wave normally incident onto the inter- 

Ap = 800 MHz. The gray line does not fit the experimental data. 7 is the mean probability of direct scattering, which is low for the given experimental conditions. Reprinted with permission from Bordo and Rubahn (2003). Copyright 2003, the American Physical Society. 

Rubahn, Evanescent Wave Spectroscopy in Encyclopedia of Nanoscience and Nanotechnology, Vol. 3, H.S. Nalwa (Ed.)/ American Scientific Publishers, Galifornia, 2004. 

Rubahn, Multiphoton Spectroscopy Near Gas-Solid Interfaces in Trends in Applied Spectroscopy, Vol. 4,2002. 

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