ISSN:
1572-8951
Schlagwort(e):
Second-harmonic generation
;
adsorbate-surface interaction
;
LB-type monolayer
;
concentration series
;
total reflection geometry
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Chemie und Pharmazie
Notizen:
Abstract We have studied the coherent superposition of nonlinear optical signals due to the substrate background and an organic surface layer deposited on this substrate by second-harmonic generation (SHG). The increased sensitivity of the total reflection geometry used permits identification of subtle details of this superposition; for example partial cancellation of the phase-reversed SH-signals or the observation of a coverage-density-dependent tilt angle of the organic chromophores. The second-harmonic signals from the Langmuir-Blodgett-type monolayers exceed the SH-response of the adsorbates prepared by simple wetting with chloroform solutions of the same amphiphilic dyes by two orders of magnitude under identical coverage-density conditions.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00161662
