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Magnetization-induced optical nonlinearity in ferromagnetic GaMnAs
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) Transient probe beam reflection change as a function of time delay between pump and probe beams for different combinations of pump∕probe circular polarizations, indicated by for right-handed (left-handed) circular polarizations. The sample temperature is and the center wavelength is . The data were taken in a magnetic field of applied normal to the plane of the GaMnAs layer. The inset curves show Kerr ellipticities at different pump polarizations.

Image of FIG. 2.
FIG. 2.

(Color online) (a) Transient reflection changes for several magnetic fields observed at the following experimental conditions: temperature is , center wavelength is , and polarization configuration is . (b) Amplitude of coherent signal near zero time delay as a function of magnetic field. The vertical scale was shifted such that the amplitude of the coherent artifact at zero field corresponds to zero.

Image of FIG. 3.
FIG. 3.

(Color online) (a) Transient reflection changes at different sample temperatures observed at and , at center wavelength , and polarization configuration . (b) Amplitude of coherent artifact signal as a function of applied sample temperature. The amplitude value was obtained by subtracting the signal at from that at .

Image of FIG. 4.
FIG. 4.

The amplitude of the coherent signal (full squares) and MCD (open circles) as a function of pulse center wavelength.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magnetization-induced optical nonlinearity in ferromagnetic GaMnAs