Great Open day today................ about 8 MSc candidates visited the Photonics Lab (edit: now the lab is officially named Emergent Photonics Lab)

Thanks to Maxwell Rowley (MSc in our research team) for giving his unique perspective on the matter to future collegues.

Keep in touch with the Open Days Programme at




Time for a group photo

M. Shalaby, M. Peccianti, D. G. Cooke, C. P. Hauri and R. Morandotti, “Temporal and spectral shaping of broadband terahertz pulses in a photoexcited semiconductor”, Applied Physics Letters, 106, 051110 (2015)

Transmission through a photoexcited semiconductor is used to temporally and spectrally shape a terahertz (THz) pulse. By adjusting the optical pump-THz probe delay, we experimentally introduce a polar asymmetry in the pulse profile as large as 92%. To shape the spectrum, we apply the same technique after strongly chirping the terahertz pulse. This leads to significant reshaping of the spectrum resulting in a 52% upshift of its median value. The pulse shaping techniques introduced here are of particular importance for temporal and spectral shape-sensitive THz nonlinear experiments.

The article is published here

Today the Summer School


Starts Cargese. Marco Peccianti will be lecturing about "From Solitons to Ultrafast Optical Clocks" .  The details are available here.

The view from Cargese is breath-taking





M. K. Mridha, A. Mazhorova, M. Clerici,  I. Al-Naib, M. Daneau, X. Ropagnol, M. Peccianti, C. Reimer, M. Ferrera, L. Razzari, F. Vidal and Roberto Morandotti, “Active terahertz two-wire waveguides”, Opt. Express 22, 22340 (2014).

 (a) Schematic for the dielectric support holder for the wires of diameter 250 μm. The central hole is 800 μm in diameter, while the separation between the two wires is 300 μm. (b) Top-view of the experimental setup used for calibrating the maximum signal attainable from the GaAs integrated semi-large area PC antenna. The emitted THz radiation is focused onto a ZnTe crystal. Changes in the probe beam (800 nm) polarization are measured using a Wollaston prism and photo detectors (PDs). (c) Details of the integrated semi-large area PC antenna used to generate THz radiation, (d) schematic of the passive configuration where the THz radiation from the integrated semi-large area PC antenna is coupled into the two-wire waveguide, (e) schematic of the active configuration; here both the generation and the coupling of the THz radiation occur directly inside the two-wire waveguide. The arrows indicate the direction of the THz radiation emitted in each case in the plane containing the two wires.

The full text is accessible here