Concept
Inversion de population
Publications associées (56)
Terahertz emission from diamond nitrogen-vacancy centers
László Forró, Ferenc Simon, Bence Gábor Márkus, Sándor Kollarics
Coherent light sources emitting in the terahertz range are highly sought after for fundamental research and applications. Terahertz lasers rely on achieving population inversion. We demonstrate the generation of terahertz radiation using nitrogen-vacancy c ...
Amer Assoc Advancement Science2024Search for long-lasting electronic coherence using on-the-fly ab initio semiclassical dynamics
Jiri Vanicek, Alan Scheidegger, Nikolay Golubev
Using a combination of high-level ab initio electronic structure methods with efficient on-the-fly semiclassical evaluation of nuclear dynamics, we performed a massive scan of small polyatomic molecules searching for a long-lasting oscillatory dynamics of ...
AIP Publishing2022How free exciton-exciton annihilation lets bound exciton emission dominate the photoluminescence of 2D-perovskites under high-fluence pulsed excitation at cryogenic temperatures
Michael Graetzel, Jovana Milic, Yang Li, Algirdas Ducinskas
Photoluminescence (PL) spectra of atomically thin 2D lead iodide perovskite films are shown to depend on excited-state density, especially at cryogenic temperatures. At high excited-state densities and low temperatures, free exciton (FE) emission is so sup ...
AMER INST PHYSICS2021Electronic Population Transfer via Impulsive Stimulated X-Ray Raman Scattering with Attosecond Soft-X-Ray Pulses
Christoph Bostedt, Xiang Li, Andre Al Haddad, Solène Oberli, Siqi Li
Free-electron lasers provide a source of x-ray pulses short enough and intense enough to drive nonlinearities in molecular systems. Impulsive interactions driven by these x-ray pulses provide a way to create and probe valence electron motions with high tem ...
AMER PHYSICAL SOC2020Room temperature single photon emission from planar GaN/AlN quantum dot samples grown by MBE
Nicolas Grandjean, Gordon Jens Callsen, Sebastian Pascal Tamariz Kaufmann
We present an overview on the growth and the optical properties of GaN quantum dots (QDs) embedded in planar AlN grown on the following three different types of substrates: single AlN crystal, AlN on sapphire, and AIN on Si(111). QD density control over th ...
IEEE2019IR-induced conformational isomerization of a helical peptide in a cold ion trap
Thomas Rizzo, Aleksandra Zabuga, Annette Svendsen, Caroline Seaiby
In this work we use laser-induced population transfer techniques to study the conformational isomerization of a helical peptide, Ac-Phe-(Ala)5-LysH+, in a cold ion trap. In one scheme, called IR-UV hole-filling spectroscopy, a single conformation is select ...
American Institute of Physics2016