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physics.optics2026
Optical superradiance from single-digit-femtosecond electron beam structure
Chad Pennington, Gia Azcoitia, Blae Stacey +5
We report measurements of superradiant optical transition radiation in the 550-800 nm range produced by ultrashort relativistic electron bunches at a dielectric boundary. In the me…
physics.optics2026
Upstream Laser-based Longitudinal Enhancement of Relativistic Photoelectrons
Hao Zhang, Randy Lemons, Jack Hirschman +23
Controlling the longitudinal phase space of high-brightness relativistic electron beams is crucial for advancing a broad spectrum of charged-particle-based instrumentation and scie…
physics.optics2025
Antisymmetric chirp transfer to high-energy ultraviolet pulses via gas-based chirped four-wave mixing
Linshan Sun, Hao Zhang, Cameron Leary +5
Spectro-temporal shaping of high-power femtosecond ultraviolet (UV) pulses remains a key challenge in ultrafast optics. Tailoring high-energy, ultrashort UV pulses underpins applic…