Multiphoton absorption and nonlinear refraction of GaAs in the mid-infrared.
We 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.
Hurlbut
W C
WC
Department of Physics, Oregon State University, Corvallis 97331-6507, USA.
Lee
Yun-Shik
YS
Vodopyanov
K L
KL
Kuo
P S
PS
Fejer
M M
MM