Time-resolved surface second harmonic generation: a test of the method and its application to picosecond isomerization in adsorbates

The application of time-resolved surface second harmonic generation (TRSSHG) as a surface-specific probe of picosecond reaction kinetics has been studied. The method was tested by comparing the measured dynamics with those obtained from the time-resolved fluorescence (TRF) technique. The agreement b...

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Bibliographic Details
Published in:Journal of physical chemistry (1952) 1990-06, Vol.94 (12), p.4913-4920
Main Authors: Meech, Stephen R, Yoshihara, Keitaro
Format: Article
Language:English
Subjects:
400201 - Chemical & Physicochemical Properties
COMPARATIVE EVALUATIONS
Condensed matter: electronic structure, electrical, magnetic, and optical properties
DATA
DATA ANALYSIS
Exact sciences and technology
EXPERIMENTAL DATA
FREQUENCY MIXING
HARMONIC GENERATION
INFORMATION
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
KINETICS
MATERIALS
MEASURING INSTRUMENTS
MEASURING METHODS
NUMERICAL DATA
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Physics
REACTION KINETICS
SURFACE PROPERTIES
Time-resolved optical spectroscopies and other ultrafast optical measurements in condensed matter
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Summary:The application of time-resolved surface second harmonic generation (TRSSHG) as a surface-specific probe of picosecond reaction kinetics has been studied. The method was tested by comparing the measured dynamics with those obtained from the time-resolved fluorescence (TRF) technique. The agreement between the two methods was good. It is concluded that the TRSSHG method is a useful probe of picosecond surface chemistry. Small differences between fluorescence and second harmonic data are explained by a consideration of the different natures of the two experiments. The surface-specific method is essentially an analogue of transient absorption spectroscopy, except that induced changes in hyperpolarizability are measured.
ISSN:0022-3654
1541-5740
DOI:10.1021/j100375a029