Theory of photodesorption of molecules by resonant laser-molecular vibrational coupling

Gortel, Zbigniew W.; Kreuzer, H. J.; Piercy, P.; Teshima, R.

doi:10.1103/physrevb.27.5066

Cited by 142 publications

(28 citation statements)

References 27 publications

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“…Such an effect has been predicted for physisorbed molecules [6] and observed for physisorbed H 2 and D 2 on metals [7]. Our theory [8,9] can account for our observations in all important aspects. In particular, the observed PD rate and its dependence on radiation temperature and isotope mass are fully recovered.…”

supporting

confidence: 82%

Photo- and Thermodesorption of Helium on Pt(111)

et al. 2002

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In a detailed study of thermal desorption of monolayers of both 4He and 3He adsorbed on Pt(111) (binding energy about 9 meV), we have observed photodesorption induced by the blackbody radiation from a room temperature environment. This process proceeds independently of the thermal desorption. Theoretical treatments of both thermal and photodesorption are given and agree very well with the data in all important aspects. We conclude that the photodesorption is due to direct coupling of photons to the adsorbate.

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confidence: 82%

Photo- and Thermodesorption of Helium on Pt(111)

et al. 2002

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“…In addition, the lack of isotopic selectivity argues for a thermal desorption mechanism. Thus the observed dependence of the resonant desorption yield on various experimental parameters is consistent with resonant heating in the adlayer followed by thermal desorption [26].…”

supporting

confidence: 75%

Vibrational resonant desorption from surfaces using the infrared free-elctron laser

1990

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The IRFEL is a useful infrared light source that can be employed as a probe of vibrational dynamics on surfaces. This paper will discuss the application of the IRFEL to desorb adsorbates from surfaces by resonantly exciting their vibrational modes. This application is illustrated by recent investigations of the resonant desorption of butane from Al2O(1120) using the Mark III IRFEL. These resonant desorption studies revealed a greater desorption yield for the asymmetric C-H stretches in comparison with the symmetric C-H stretches. This greeter desorption efficiency for the asymmetric C-H stretches was attributed to the orientation of the butane molecules in an ordered adlayer on A1203 (1120).

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“…Our results also show the equivalence of the steady-state properties -f computed using the golden rule [14], the random-phase approximation [12,22] situation considered in the previous section, the probability of finding an adsorbed molecule in its first-excited vibrational level is 0.03, which suggests that resonant excitation of a molecule adsorbed on a metal surface could provide a means of laser-enhanced surface reactions. The region where the hypothesis of harmonicity fails is darkened with points.…”

Section: Discussionmentioning

confidence: 56%

“…The use of this simplification has entailed the neglect of the nondiagonal elements of the density matrix to compute its evolution, and this approximation has remained questionable in the case of the interaction between a laser and a molecule [12]. It has been used extensively, either implicitly in application of the golden rule [14], or explicitly [13,22]. Our theoretical development proves that this approximation leads to the correct kinetic equation for the populations of the vibrational levels.…”

Section: Discussionmentioning

confidence: 98%