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Thermalization kinetics of light: From laser dynamics to equilibrium condensation of photons
Julian Schmitt, Tobias Damm, David Dung +3
We report a time-resolved study of the thermalization dynamics and the lasing to photon Bose-Einstein condensation crossover by in-\textit{situ} monitoring the photon kinetics in a…
Experimental control of transport resonances in a coherent quantum rocking ratchet
Christopher Grossert, Martin Leder, Sergey Denisov +2
The ratchet phenomenon is a means to get directed transport without net forces. Originally conceived to rectify stochastic motion and describe operational principles of biological…
Veselago lensing with ultracold atoms in an optical lattice
Martin Leder, Christopher Grossert, Martin Weitz
Veselago pointed out that electromagnetic wave theory allows for materials with a negative index of refraction, in which most known optical phenomena would be reversed. A slab of s…
Laser cooling of dense atomic gases by collisional redistribution of radiation and spectroscopy of molecular dimers in a dense buffer gas environment
Anne Saß, Ralf Forge, Stavros Christopoulos +3
We study laser cooling of atomic gases by collisional redistribution of fluorescence. In a high pressure buffer gas regime, frequent collisions perturb the energy levels of alkali…
Kennard-Stepanov relation connecting absorption and emission spectra in an atomic gas
Peter Moroshkin, Lars Weller, Anne Sass +2
The Kennard-Stepanov relation describes a thermodynamic, Boltzmann-type scaling between the absorption and emission spectral profiles of an absorber, which applies in many liquid s…