Nature Communications paper!

Sub-10-fs observation of bound exciton formation in organic optoelectronic devices comes out in Nature Communications. I participated in the ultrafast Pump – Probe, Pump-Push-Photocurrent and Pump-Push-Photoluminescence setup development and alignment, the fastest spectroscopic setup I ever worked with. (in absolute values – THz setups allow for Single oscillation pulses and time resolutions compared with wavelength/c).

We find that excitons created by near-absorption-edge photons are intrinsically bound states, or become such within 10 fs after excitation. Meanwhile, excitons with a modest >0.3 eV excess energy can dissociate spontaneously within 50 fs before acquiring bound character.

Topical two-part review comes out in Light – Advanced Manufacturing!

Design of broadband terahertz vector and vortex beams: I. Review of materials and components Describes the approaches to broadband THz vortices generation, and Design of broadband terahertz vector and vortex beams: II. Holographic assessment Shows how THz pulse time domain holography can be used to visualise the dynamics of their buildup and further propagation, check the efficiency of generators, and model the experiments before actual runs.