Ultrabroadband dispersive radiation by spatiotemporal oscillation of multimode waves

Despite the abundance and importance of three-dimensional systems, relatively little progress has been made on spatiotemporal nonlinear optical waves compared to time-only or space-only systems. Here we study radiation emitted by three-dimensionally evolving nonlinear optical waves in multimode fiber. Spatiotemporal oscillations of solitons in the fiber generate multimode dispersive wave sidebands over an ultrabroadband spectral range. This work suggests routes to multipurpose sources of coherent electromagnetic waves, with unprecedented wavelength coverage.Comment: 13 pages, 3 figures, Supplementary Movie files for preprint available at: https://www.youtube.com/watch?v=h3meO8G6ZzA and https://www.youtube.com/watch?v=k42llO-c1r

Reconciling with the Past: Ana Lucia Araujo’s Lecture on Coming to Terms with the Past When Monuments Are Taken Down

On Thursday, November 2nd, Howard University History Professor Ana Lucia Araujo visited Gettysburg College to give a lecture titled “Slavery, Memory, and Reparations: Coming to Terms with the Past When Monuments Are Taken Down.” The historian, author, and professor talked about the history of slavery as well as the concepts of memory and reparations. One form of reparations discussed recently has been the removal of Confederate monuments in the United States, which has been heavily debated for years. [excerpt