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✦   LIBER   ✦

Surface charge dependence of second harmonic generation from a Ni electrode

✍ Scribed by G Nagy; D Roy

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
539 KB
Volume
214
Category
Article
ISSN
0009-2614

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✦ Synopsis

The third-order susceptibility of a charged metal surface can strongly affect the efficiency for optical second harmonic generation from that metal. We present preliminary evidence for this effect on a polycrystalline Ni electrode probed at a fundamental wavelength of 1064 nm. The surface charge is varied and measured electrochemically, and the charge-dependent surface second harmonic signal is analyzed with a simple free-electron model. The results indicate that the third-order hyperpolarizabilities of the Ni electrode are predominant over the corresponding second-order polarizability terms.

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