Abstract
The IR absorption of p-type germanium ~10 μm is due to transitions from the heavy to light hole band.1 Strong bleaching of the absorption has been found after excitation with nanosecond pulses from CO2 lasers.2 Nanosecond measurements give only limited information on the mechanisms underlying the observed absorption changes, since carrier-carrier and carrier- phonon scattering occur on a time scale much faster than 1 ns.
© 1990 Optical Society of America
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