Session Overview |
High Power Laser Technology, Ultrafast Optics and Applications - Bloc 4Room: International 1 |
Date: Thursday, June 07 |
15:30 |
Resolving Dynamics of Correlated Materials in the THz Regime
Main Author: Jacob Burgess Organization: University of Manitoba, Canada Advances in THz radiation generation have enabled remarkable new ways to measure picosecond scale dynamics. Developments pairing scanning tunneling microscopy with THz pulses will be discussed along with results from a recent experiment measuring atomically resolved dynamics of a correlated electron material. |
15:55 |
Measurements of sub-picosecond and femtosecond separations of charged particle micro-bunches using THz radiation
Main Author: Ivan Konoplev Organization: Department of Physics, University of Oxford, United Kingdom Micro-bunched charged particle beams are used for a wide range of research including design and study of tunable sources of THz radiation. Accurate and non-destructive monitoring of the bunch-to-bunch separation is needed but it is still a challenge. We present the results of proof-of-principle experiments conducted at the LUCX accelerator which measured the distance between micro-bunches via the analysis of the amplitude modulation of the emitted THz radiation. Good agreement with theoretical predictions is shown and limitations are discussed. |
16:20 |
Phase control of broadband THz pulses
Main Author: Lauren Gingras Organization: McGill University, Canada We demonstrate an all-optical, fully reconfigurable platform with control over the broadband spectral phase of a THz pulse. The platform is capable of creating both negatively and positively chirped THz pulses over a wide bandwidth and controlling the carrier-envelope phase of a THz pulse. |
16:35 |
Frequency-tunable THz source using Ar-filled HC-PCF pulse shaper
Main Author: Wei Cui Organization: University of Ottawa, Canada We demonstrate a frequency-tunable phase-locked terahertz (THz) source relying on nonlinear optical propagation of a femtosecond near-infrared pulse inside a gas-filled hollow-core photonic-crystal fiber (HC-PCF). |
16:50 |
Deep Sub-Wavelength SiN-based Metallic Slit for Ultra-Broadband THz Coherent Detection
Main Author: Alessandro Tomasino Organization: INRS-EMT, Canada We present a new type of integrated device for terahertz solid-state biased coherent detection, relying on a 1-µm-wide metallic slit embedded in a thin film of silicon nitride. |
17:05 |
Nonlinear Frequency Mixing Between Terahertz and Optical Waves in Silica
Main Author: Diego Caraffini Organization: INRS, Canada We present a study of the interaction between terahertz and optical pulses in a slab of UV fused silica in both co- and counter-propagating configurations. |
17:20 |
Design and Fabrication of Terahertz Bragg Gratings on a Two-Wire Waveguide
Main Author: Giacomo Balistreri Organization: INRS-EMT, Canada In this study, we present the design and the fabrication procedure of waveguide-integrated Bragg Gratings operating at THz frequencies |
17:35 |
Terahertz spectral encoding of the k-space
Main Author: Hichem Guerboukha Organization: École Polytechnique de Montréal, Canada Acquisition time is a major hurdle in terahertz imaging. To reduce the number of pixels, we use spectral encoding in a single-pixel detection scheme. We demonstrate the reconstruction process for amplitude and phase masks. |
17:50 |
Averaging of the pump-probe traces using statistical models: denoising in THz time-domain spectroscopy
Main Author: Hichem Guerboukha Organization: École Polytechnique de Montréal, Canada We develop mathematical models for the noise that allow to mitigate noise in pump-probe optical experiments. We experimentally demonstrate the validity of our approach by using measurements from a terahertz time-domain spectroscopy system. |
18:05 |
Ultrafast Electron Emission by Intense THz Pulses
Main Author: Dominique Matte Organization: McGill University, Canada Sub-cycle electron emission from a tungsten nanotip is demonstrated under illumination by intense singlecycle terahertz (THz) light pulses. Electron wavepackets are emitted on sub-cycle time scales following the Schottky-Nordheim emission theory with bunch charges as high as several femtoCoulombs, approaching single-shot imaging and diffraction capabilities. |