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- W4386794473 abstract "Standard optical pump-probe techniques allow to study a temporal response of a system to a laser pulse starting from the sub-femtoseconds to several nanoseconds, limited by the length of the optical delay line. Resistance is a sensitive detector of a plethora of phenomena in solid state, nanostructure physics, chemistry, and biology. However, resistance measurements are typically rather slow (> microsecond) because they require stabilization of current or voltage and analog-to-digital conversion. Here we develop a time-resolved pump-probe technique, where the Pump is an optical pulse from the laser and the Probe is a rectangular electrical pulse passing through the sample under study. Transmission of the probe pulse through the sample is measured in the 50 Ohm matched circuit with the digital oscilloscope. The delay can be electrically driven from nanoseconds to seconds. We demonstrate the usability of the technique to study heat-induced changes in a thin amorphous VO$_x$ film and carrier relaxation in a CdS photoresistor. The technique could be further explored to study heat transfer, biochemical reactions, and slow electronic transformations." @default.
- W4386794473 created "2023-09-16" @default.
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- W4386794473 date "2023-09-14" @default.
- W4386794473 modified "2023-09-30" @default.
- W4386794473 title "Laser-pump-resistive-probe technique to study nanosecond-scale relaxation processes" @default.
- W4386794473 doi "https://doi.org/10.48550/arxiv.2309.07883" @default.
- W4386794473 hasPublicationYear "2023" @default.
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