Our article “Thermal effects in molecular gas-filled hollow-core fibers” was published online in Optics Letters (https://doi.org/10.1364/OL.422983)! This work was led primarily by John Beetar, and features some cool measurements showing how the supercontinuum spectrum generated in N2O-filled fiber varies from shot to shot at 50 kHz repetition rate as it approaches thermal equilibrium.
Jonathan Nesper was awarded the 2021 Department of Defense National Defense Science and Engineering Graduate Fellowship! For the next three years, Jonathan will be supported by the fellowship to develop intense, long-wavelength sources for coherent control of magnetism in antiferromagnetic insulators. Congratulations, Jonathan!
Our article “All-optical sampling of few-cycle infrared pulses using tunneling in a solid” was published online in Photonics Research (doi: https://doi.org/10.1364/PRJ.420916, Early Posting pdf: https://www.osapublishing.org/prj/upcoming_pdf.cfm?id=420916)! This work was led primarily by Yangyang Liu, but with important contributions from current and former members of the LUMAS group. The work describes a variant on the TIPTOE (tunnel ionization with a perturbation for time-domain observation of an electric field) technique for characterizing laser waveforms, and we are excited about its future prospects for single-shot, on-chip waveform measurements!
John and Mike co-authored a Nature News & Views article, “Spectral narrowing broadens applications” describing the recent work “Extreme-ultraviolet spectral compression by four-wave mixing” by Drescher and colleagues from the Max-Born Institute in Berlin. It’s always a pleasure to be able to help spotlight important work like this!
John completed his PhD yesterday, with the successful defense of his dissertation entitled “Tunable Few- To Many-Cycle Source for High-Order Harmonic Generation and Time-Resolved Spectroscopy” on Zoom. Congratulations to Dr. Beetar!
Last Friday, we welcomed UCF President Alexander Cartwright to the LUMAS lab! Here, PhD student John Beetar explains how control over light fields can allow us to control quantum material properties and allow us to transition fundamental science of strong-field interactions into novel devices!
Our recent work is highlighted in the November 2020 issue of Optics and Photonics News! The article “Towards Attosecond Science with Workaday Lasers” covers work published in our recent Science Advances paper.
Our article “Multioctave supercontinuum generation and frequency conversion based on rotational nonlinearity” was published today in Science Advances! This work was led by John and Murty, but included contributions from many others, including a collaboration with Bonggu Shim’s group at Binghamton University.
Our theory paper on electron-electron correlations in BaTiO3 was published in the Journal of Physics: Condensed Matter! This work was the result of a joint experiment/theory collaboration with Dr. Volodymyr Turkowski, and supported by the NSF under award no. 1809181.
Congratulations to Chau Truong for passing her Dissertation Proposal, and moving into PhD candidacy! Chau’s dissertation will focus on developing a source of isolated attosecond pulses using our Yb:KGW laser, and applying them to study dynamics in atomic systems using attosecond interferometry.