Abstract
We present here experimental and theoretical results concerning the photoluminescence spectra of intrinsic germanium under 1.06 μm pulsed excitation at temperatures 295 and 174 K. At 295 K with increasing excitation level, the peak of the spectrum shifts from 1.76 to 1.54 μm, corresponding respectively to the indirect and direct energy gaps. We present results of a fundamental calculation that accounts for the above behavior and the emission band shape.
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