PICOSECOND IR STUDIES OF THE VIBRATIONAL DYNAMICS OF CO/PT(111)

被引：20

作者：

BECKERLE, JD

CASASSA, MP

HEILWEIL, EJ

CAVANAGH, RR

STEPHENSON, JC

机构：

[1] Center for Atomic, Molecular and Optical Physics National Institute of Standards and Technology Gaithersburg

来源：

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA | 1990年 / 54卷

关键词：

D O I：

10.1016/0368-2048(90)80197-I

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The vibrational dynamics of chemisorbed CO on Pt(111) are investigated by picosecond IR transient saturation spectroscopy. An intense ps pump pulse excites the CO stretch vibration for CO/Pt(111) and the transient differential IR spectrum of the vibrationally excited adlayer is monitored with a second IR probe pulse. The transient spectrum exhibits a dispersive bandshape, with both bleach and absorption features. The transient spectrum appears prior to the pump pulse and decays within a few ps following the pump pulse. The results are interpreted by comparison with analogous measurements on metal carbonyl molecules, and model calculations including the effects of optical coherence.

引用

页码：17 / 26

页数：10

共 18 条

[1]

ANGEL SA, 1990, 7TH P TOP M ULTR PHE

[2] EXCITED-STATES AT METAL-SURFACES AND THEIR NONRADIATIVE RELAXATION [J].

AVOURIS, P ;

PERSSON, BNJ .

JOURNAL OF PHYSICAL CHEMISTRY, 1984, 88 (05) :837-848

[3] ULTRAFAST INFRARED RESPONSE OF ADSORBATES ON METAL-SURFACES - VIBRATIONAL LIFETIME OF CO/PT(111) [J].

BECKERLE, JD ;

CASASSA, MP ;

CAVANAGH, RR ;

HEILWEIL, EJ ;

STEPHENSON, JC .

PHYSICAL REVIEW LETTERS, 1990, 64 (17) :2090-2093

[4]

BECKERLE JD, 1989, J CHEM PHYS, P4619

[5]

BECKERLE JD, IN PRESS

[6]

BRIOTCURZ CH, 1988, IEEE J QUANTUM ELECT, V24, P261

[7] TIME-DOMAIN MEASUREMENTS OF VIBRATIONAL-RELAXATION AT SURFACES - CO(V=1) IN METAL-CARBONYL SYSTEMS [J].

CAVANAGH, RR ;

HEILWEIL, EJ ;

STEPHENSON, JC .

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 1987, 45 :31-40

[8] ELECTRON-HOLE-PAIR DAMPING OF AN EXCITED-STATE OF A MOLECULE ADSORBED ON A METAL-SURFACE [J].

EGUILUZ, AG .

PHYSICAL REVIEW B, 1984, 30 (08) :4366-4371

[9] LIFETIME OF AN ADSORBATE-SUBSTRATE VIBRATION - H ON SI(111) [J].

GUYOTSIONNEST, P ;

DUMAS, P ;

CHABAL, YJ ;

HIGASHI, GS .

PHYSICAL REVIEW LETTERS, 1990, 64 (18) :2156-2159

[10] MOLECULAR VIBRATIONAL-ENERGY RELAXATION AT A METAL-SURFACE - METHYL THIOLATE ON AG(111) [J].

HARRIS, AL ;

ROTHBERG, L ;

DUBOIS, LH ;

LEVINOS, NJ ;

DHAR, L .

PHYSICAL REVIEW LETTERS, 1990, 64 (17) :2086-2089

← 1 2 →