A comparison is made between the interaction of electron bunches and intense laser pulses with plasma. The laser pulse is modelled with photon kinetic theory, i.e. a representation of the electromagnetic field in terms of classical quasi-particles with space and wave number coordinates, which enables a direct comparison with the phase space evolution of the electron bunch. Analytical results ar...

Photon or dilepton production by a hot plasma is expected to reflect rather cleanly the state of the system. Indeed, in the collision of two heavy nuclei, the typical size of the system is much smaller than the mean free path of particles that feel only the electromagnetic interactions, which enables photons and leptons to escape freely. However, it has been realized recently that those rates a...

We theoretically analyze exciton-photon oscillatory dynamics within a homogenous polariton gas in the presence of energy detuning between the cavity and quantum well modes. Whereas pure Rabi oscillations consist of the particle exchange between the photon and exciton states in the polariton system without any oscillations of the phases of the two subcondensates, we demonstrate that any nonzero ...

We study photon production from the hidden local symmetry approach that includes π, ρ, and a1 mesons and compute the corresponding photon emission rates from a hadronic gas in thermal equilibrium. Together with experimental radiative decay widths of the background, these rates are used in a relativistic transport model to calculate single photon spectra in heavy-ion collisions at SPS energies. ...

Magnesium-walled argon gas flow ionization chamber (Mg(Ar)) is used for photon dose measurements in the epithermal neutron beam of FiR 1 reactor in Finland. In this study, the photon dose measurements were re-evaluated against calculations applying a new chamber calibration factor defined in water instead of in air. Also, effect of the build-up cap on the measurements was investigated. The new ...

We have made a single-photon detector that relies on photoconductive gain in a narrow electron channel in an AlyGa12yAs/GaAs two-dimensional electron gas. Given that the electron channel is one dimensional, the photoinduced conductance has plateaus at multiples of the quantum conductance 2e/h . Superimposed on these broad conductance plateaus are many sharp, small, conductance steps associated ...

Plasma-induced charging of patterned-dielectric structures during device fabrication can cause structural and electrical damage to devices. In this work, we report on vacuum-ultraviolet VUV radiation-induced charge depletion in plasma-charged patterned-silicon-oxide dielectric wafers. Charge depletion is studied as a function of photon energy and the aspect ratio of hole structures. The wafers ...

Gas plasma, a fourth state of matter, is a neutral composition of ions, electrons, radicals, and photons that is synthesized by applying energy to a gas at atmospheric pressure or within a vacuum. Gas plasma can be used to enhance the functionality of microdevices for various biological and chemical applications. The effects of plasma in microchannels are regulated by parameters such as the typ...