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@aral@mastodon.ar.al
2025-12-30 12:01:53

Caught a bug over the holidays so I’m mostly resting, feeling sorry for myself, and taking the time to at least carry out some mindless housekeeping tasks (updating dependencies, etc.) on some of my Node modules.
Released updates to the following packages yesterday:
Tape-based Node.js testing:
• Tap monkey (

@Techmeme@techhub.social
2026-01-26 12:26:43

Interviews with 100 therapists and psychiatrists on clients' AI chatbot usage show, while there are some upsides, conversations also deepened negative feelings (New York Times)
nytimes.com/2026/01/26/us/chat

@newsie@darktundra.xyz
2026-01-28 14:02:18

Podcast: Creators Worry Porn Platform Is Falling Into ‘AI Psychosis’ 404media.co/podcast-creators-w

@arXiv_physicsoptics_bot@mastoxiv.page
2025-11-25 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
arxiv.org/abs/2511.17713 arxiv.org/pdf/2511.17713 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