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Proceedings Paper

Study of chiral properties of surfaces using second-harmonic generation
Author(s): Herman I. Yee; Jeff D. Byers; Teresa P. Petralli-Mallow; Janice M. Hicks
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Paper Abstract

We explore the link between the surface sensitive spectroscopic method, second harmonic generation (SHG), and a popular linear optical method, circular dichroism spectroscopy (CD), in order to study chiral structures within monolayers. The experiment involves utilizing circularly polarized light as an excitation source in the usual reflection SHG geometry. We show that circular dichroic information is conveyed through the SHG process. SHG-CD was used to study the adsorption of R-2,2'-dihydroxy-1,1'-binaphthyl (R-BN) at the air/fused quartz and air/water interfaces. The SHG-CD spectra of R-BN show a strong preference for left-circularly polarized light over right-circularly polarized light for adsorption at both the air/glass and air/water interfaces. The magnitude of the preference is 103 times larger than that observed in ordinary CD spectroscopy, and is attributed to the fact that the species are oriented at the interfaces.

Paper Details

Date Published: 22 April 1993
PDF: 11 pages
Proc. SPIE 1858, Laser Techniques for State-Selected and State-to-State Chemistry, (22 April 1993); doi: 10.1117/12.143100
Show Author Affiliations
Herman I. Yee, Georgetown Univ. (United States)
Jeff D. Byers, Georgetown Univ. (United States)
Teresa P. Petralli-Mallow, Georgetown Univ. (United States)
Janice M. Hicks, Georgetown Univ. (United States)

Published in SPIE Proceedings Vol. 1858:
Laser Techniques for State-Selected and State-to-State Chemistry
Cheuk Yiu Ng, Editor(s)

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