Multiphoton absorption and nonlinear refraction of GaAs in the mid-infrared
2007; Optica Publishing Group; Volume: 32; Issue: 6 Linguagem: Inglês
10.1364/ol.32.000668
ISSN1539-4794
AutoresW. C. Hurlbut, Yun-Shik Lee, K. L. Vodopyanov, Paulina S. Kuo, M. M. Fejer,
Tópico(s)Laser-Matter Interactions and Applications
ResumoWe report the wavelength dependencies of the two- and three-photon absorption coefficients of undoped GaAs in the spectral range 1.3-3.5 microm, as well as nonlinear refractive index n2 in the range 1.7-3.25 microm. The data were obtained by using the single-beam Z-scan method with 100-fs-long optical pulses. Anisotropy of the three-photon absorption coefficient was observed and found to be consistent with the crystal symmetry of GaAs.
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