Resonant Second-Harmonic Generation in the Exciton Region of CuCl and ZnO

Autor:	Herbert Mahr, D. C. Haueisen
Rok vydání:	1973
Předmět:	Materials science business.industry Exciton Ruby laser Physics::Optics Second-harmonic generation Frequency dependence Reflectivity law.invention Nonlinear system law Optoelectronics Atomic physics business Tunable laser
Zdroj:	Physical Review B. 8:734-745
ISSN:	0556-2805
DOI:	10.1103/physrevb.8.734
Popis:	Using a pulsed tunable dye laser pumped by a $Q$-switched ruby laser, the frequency dependence of second-harmonic generation has been measured in the region of the first and second $1s$ excitons of CuCl from about 3.18 to 3.34 eV and the region of the $C$ exciton of ZnO from about 3.38 to 3.48 eV. From the data, the frequency dependence of the optical nonlinear susceptibility has been determined using linear optical constants calculated by a Kramers-Kr\"onig analysis of reflectivity. The results for the single nonzero term of the nonlinear susceptibility of CuCl and the two terms ${d}_{\mathrm{zzz}}$ and ${d}_{\mathrm{zxx}}$ of ZnO have been fit theoretically by an anharmonic-oscillator model employing two oscillators.
Databáze:	OpenAIRE
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