Non-thermal photodesorption of N{sub 2} from Ag(111)
Conference
·
OSTI ID:653963
The authors have measured translational and rotational energy distributions of N{sub 2} molecules following desorption from a Ag(111) surface by infrared (1,064 nm) radiation. The observed desorption yields were large even at laser fluences far below that required for laser induced thermal desorption. State resolved laser techniques using coherent VUV radiation showed that the rotational and translational energy distributions of the desorbing N{sub 2} molecules are not consistent with the predictions of the heat diffusion model governing laser induced surface heating. These results suggest that physisorbed adsorbates can couple directly to the nascent phonon distribution or the nascent electron-hole pairs in the photoexcited substrate without heating of the surface.
- Research Organization:
- Brookhaven National Lab., Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 653963
- Report Number(s):
- BNL--65222; CONF-980117--; ON: DE98004669
- Country of Publication:
- United States
- Language:
- English
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