2023
DOI: 10.1364/josab.496228
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Impact of pump beam spot size on semiconductor carrier dynamics in optical-pump-terahertz-probe spectroscopy

Abstract: Optical-pump-terahertz-probe (OPTP) experiments are widely employed to study the dynamics of photoexcited carriers in semiconductors. In these experiments, due to the long wavelength nature of terahertz (THz) probe radiation, the probe beam can be focused only to a spot size in the mm range. To ensure homogeneous excitation of the probed sample region, a significantly larger optical pump beam spot size must be used, which is often difficult to implement in the experiment. Frequently used experimental geometrie… Show more

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