Study of chiral properties of surfaces using second-harmonic generation

Herman I. Yee; Jeff D. Byers; Teresa P. Petralli-Mallow; Janice M. Hicks

doi:10.1117/12.143100

22 April 1993 Study of chiral properties of surfaces using second-harmonic generation

Herman I. Yee, Jeff D. Byers, Teresa P. Petralli-Mallow, Janice M. Hicks

Proceedings Volume 1858, Laser Techniques for State-Selected and State-to-State Chemistry; (1993) https://doi.org/10.1117/12.143100
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

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.

Citation Download Citation

Herman I. Yee, Jeff D. Byers, Teresa P. Petralli-Mallow, and Janice M. Hicks "Study of chiral properties of surfaces using second-harmonic generation", Proc. SPIE 1858, Laser Techniques for State-Selected and State-to-State Chemistry, (22 April 1993); https://doi.org/10.1117/12.143100

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