Abstract
AbstractAt very low temperature, the reflection properties of CuCl samples under high pulsed light excitation conditions are investigated by a “pump and probe” technique. The non‐linear reflection changes are shown to have different origins and different time scales: excitonic effects lead to a new reflection structure near the energy of the longitudinal exciton (∼ 1 ns time scale) and interaction with non‐thermalized acoustical phonons to a decrease of the exciton reflection maximum (∼ 60 ns).
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