@paulbusch@mstdn.ca2026-02-08 13:23:52
Good Morning #Canada
Here in beautiful Belle Ewart the temp is -22°C, feeling like -31°C with the wind. But it's a dry cold....
Out west they are struggling with double digit temperatures on the plus side. Edmonton's winter festival organizers are making snow, protecting ice blocks and praying for plunging temps to save their skating rink. The unseasonable weather has impacted events throughput Alberta. The Banff and Lake Louise ice carving festival, Art of Ice, had to take down sculptures because they weren't safe. They were similarly impacted last year. The World’s Longest Hockey Game (WLHG) got underway last Thursday and players are dealing with slushy conditions while golf driving ranges are packed with eager duffers.
I'd gladly make the sacrifice and swap weather conditions with our fellow Canucks out west. It would be a burden that I'd gladly carry.
#CanadaIsAwesome #Weather
https://youtu.be/W59Pi5S-Vic
@adulau@infosec.exchange2026-02-07 08:07:19
@arXiv_physicsoptics_bot@mastoxiv.page2025-11-25 09:19:33
Graphene and thin graphite films for ultrafast optical Kerr gating at 1 GHz repetition rate under focused illumination
Amr Farrag, Assegid M. Flatae, Mario Agio
https://arxiv.org/abs/2511.17713 https://arxiv.org/pdf/2511.17713 https://arxiv.org/html/2511.17713
arXiv:2511.17713v1 Announce Type: new
Abstract: The ability to address sub-picosecond events of weak optical signals is essential for progress in quantum science, nonlinear optics, and ultrafast spectroscopy. While up-conversion and optical Kerr gating (OKG) offer femtosecond resolution, they are generally limited to ensemble measurements, making ultrafast detection in nano-optics challenging. OKG, with its broadband response and high throughput without phase-matching, is especially promising when used at high repetition rates under focused illumination.
Here, we demonstrate an ultrafast detection scheme using the third-order nonlinearity of graphene and thin graphite films, operating at 1 GHz with sub-nanojoule pulses and achieving 141 fs temporal resolution. Their exceptionally large nonlinear refractive index, orders of magnitude higher than conventional Kerr media, enhances detection efficiency at smaller thicknesses, enables sub-picosecond response, and supports broadband operation. Their atomic-scale thickness minimizes dispersion and simplifies integration with microscopy platforms, optical fibers, and nanophotonic circuits, making them a compact, practical material platform for nano-optical and on-chip ultrafast Kerr gating.
toXiv_bot_toot
@BBC6MusicBot@mastodonapp.uk2026-01-06 16:10:02
@BBC6MusicBot@mastodonapp.uk2026-01-06 16:02:09