MASc Thesis Presentation - "A Tunable Vacuum Ultraviolet Light Source for TR-ARPES"

Event Date:
2019-10-17T09:00:00
2019-10-17T10:00:00
Event Location:
AMPEL room 311
Speaker:
Martin Cross
Related Upcoming Events:
Grad Theses
Intended Audience:
Public
Local Contact:

Physics and Astronomy

Event Information:

Abstract:
We detail the initial development of a tunable vacuum ultraviolet light source for time-- and angle--resolved photo emission spectroscopy (TR-ARPES); specifically, the construction and characterization of a ytterbium-fiber based pump source, and a nonlinear broadening and compression stage using gas--filled hollow--core fiber (HCF). The ultimate goal is generating sub-30fs pulses with photon energies between 5eV and 11eV via resonant dispersive wave (RDW) generation in a succeeding HCF. The interim goal, discussed herein, is producing 30fs pulses with sufficient energy (uW level) for RDW generation. Using second harmonic generation frequency resolved optical gating (SHG-FROG) we currently measure 174fs, 4.0uJ pulses. We will provide explanations for the shortcoming and suggest several possible solutions to address it.

Add to Calendar 2019-10-17T09:00:00 2019-10-17T10:00:00 MASc Thesis Presentation - "A Tunable Vacuum Ultraviolet Light Source for TR-ARPES" Event Information: Abstract: We detail the initial development of a tunable vacuum ultraviolet light source for time-- and angle--resolved photo emission spectroscopy (TR-ARPES); specifically, the construction and characterization of a ytterbium-fiber based pump source, and a nonlinear broadening and compression stage using gas--filled hollow--core fiber (HCF). The ultimate goal is generating sub-30fs pulses with photon energies between 5eV and 11eV via resonant dispersive wave (RDW) generation in a succeeding HCF. The interim goal, discussed herein, is producing 30fs pulses with sufficient energy (uW level) for RDW generation. Using second harmonic generation frequency resolved optical gating (SHG-FROG) we currently measure 174fs, 4.0uJ pulses. We will provide explanations for the shortcoming and suggest several possible solutions to address it. Event Location: AMPEL room 311