Abstract
Single-color pump-probe setup at the NovoFEL facility for measurements of carrier relaxation dynamics in semiconductors
Highlights
The idea of the pump-probe method follows a basic principle: a pump beam with a wavelength equal to a certain energy transition excites a sample
For impurities in germanium doped with arsenic (Ge) and Si these lines are in the terahertz frequency range
During the passage of the pump pulses, the sample becomes partially transparent as carriers are lifted into an excited state
Summary
The idea of the pump-probe method follows a basic principle: a pump beam with a wavelength equal to a certain energy transition excites a sample. To selectively excite excitation lines a monochromatic radiation source is needed. For impurities in Ge and Si these lines are in the terahertz frequency range. NovoFEL generates monochromatic radiation with a tunable wavelength in the range of [6-240] μm.
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