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We extend the time-transformation technique to include the delayed Raman response and apply it to study the impact of the width of few-cycle optical pulses on intrapulse Raman scattering and dispersive wave generation.
Precise and agile manipulation of frequency and phase of output signals of single-frequency optical frequency synthesizers based on a novel technique for frequency shifting of frequency combs is investigated by relative measurements between identical synthesizers.
We report observation of x-ray and optical sum frequency generation. An ultrafast optical pulse drives charge oscillations to the chemical bonds in diamond. A co-propagating x-ray pulse probes the accompanying atomic-scale chemical bond distortion.
Our ultrafast optical pump-probe measurements of 2D atomic material MoS2 show that the interband and intraband relaxation dynamics of photoexcited carriers vary significantly as a function of the number of atomic layers. Coherent phonon oscillations are also observed in our measurements.
We report the storage and retrieval of broadband optical pulses using a Raman interaction in a room-temperature ensemble of cesium atoms confined in a hollow-core photonic-crystal fibre.
We report on the generation of new wavelengths spanning over two octaves from 523 nm to 1750 nm in a standard telecommunication graded-index multimode optical fiber, mediated by the stimulated Raman scattering process.
Intersubband transitions in semiconductor quantum wells are inspected with light in meV range. For low densities electron-phonon interaction dominates the relaxation processes. We theoretically inspect relaxation processes visible in 2D photon echo experiments.
We demonstrate large THz transmission enhancement (>15%) in single-layer CVD graphene at high THz intensities (ETHz>10 kV/cm). The nonlinear effects exhibit non-Drude behavior in the THz conductivity, where THz fields induce extreme non-equilibrium electron distributions.
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