Conveners
R3-2 Ultrafast and Time-Resolved Processes (DAMOPC/DCMMP) | Procédés ultrarapides et résolus dans le temps (DPAMPC/DPMCM)
- Marc Dignam (Queen's University)
Interest in atomically-thin transition metal dichalcogenide (TMD) semiconductors such as MoS2 and WSe2 has exploded in the last few years, driven by the new physics of coupled spin/valley degrees of freedom and their potential for new spintronic and ‘valleytronic’ devices. Although robust spin and valley degrees of freedom have been inferred from polarized photoluminescence (PL) studies of...
This work demonstrates that, in order for Fourier transform infrared (FTIR) spectroscopy to be an effective materials characterization tool, it is essential to evaluate which bands are affected exclusively by specimen differences, independent of the detection and data analysis methodologies. To do this, we compared standard optical detection with photoacoustic detection of FTIR spectra for two...
Laser ablation is the process of material removal from a target surface by intense Laser radiation. The technique is used for the production of nanoparticles (NPs) and associated thin films, micromachining of surfaces, and Laser-induced breakdown spectroscopy (LIBS) for material analysis. The amount of ablated material, sample heating, plasma properties (density, temperature, and luminosity)...
In High-order Harmonic Generation (HHG), the electron that tunnel ionize from a given electronic state generally photorecombine onto the same state. We have demonstrated that during a few cycle laser pulse, several Rydberg states can be populated and open a new channels for HHG : the tunnel ionization from excited states and photorecombination onto the ground state. Using the attosecond...