کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5425914 | 1395869 | 2006 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Correct application of Fresnel's equations for intensity analysis of angle-resolved photoemission data Correct application of Fresnel's equations for intensity analysis of angle-resolved photoemission data](/preview/png/5425914.png)
The electromagnetic field relevant for the excitation process in angle-resolved photoemission is studied. We show that Fresnel's equations together with the known bulk dielectric constants can be used to calculate the complex vector potential at the metal surface. A model is developed which accounts correctly for the special experimental geometry with focused light. It is used to calculate the variation of photoemission intensity with changing light incidence angle and polarization. Experimental data for the photoemission intensity as a function of light incidence angle are presented for direct transitions out of bulk, surface and adsorbate states at a Cu(1Â 1Â 0) surface. The comparison to our model shows that the application of copper bulk optical constants is justified even when electronic states are localized to the topmost atomic layer.
Journal: Surface Science - Volume 600, Issue 5, 1 March 2006, Pages 1129-1133