Tootfinder

Manipulation of photonic topological edge and corner states via trivial claddings
Hai-Xiao Wang, Li Liang, Shuai Shao, Shiwei Tang, Junhui Hu, Yin Poo, Jian-Hua Jiang
https://arxiv.org/abs/2511.18705 https://arxiv.org/pdf/2511.18705 https://arxiv.org/html/2511.18705
arXiv:2511.18705v1 Announce Type: new
Abstract: Crystalline symmetry offers a powerful tool to realize photonic topological phases, in which additional trivial claddings are typically required to confine topological boundary states. However, the utility of the trivial cladding in manipulating topological waves is often overlooked. Here, we demonstrate two topologically distinct kagome photonic crystals (KPCs) based on different crystalline symmetries: \mathbit{C}_\mathbf{6}- symmetric KPCs exhibit a quantum spin Hall phase, while \mathbit{C}_\mathbf{3}-symmetric KPCs serve as trivial cladding. By tuning the geometric parameter of the trivial cladding, we observe that a pair of topological interface states featured with pseudospin-momentum locking undergoes a phase transition, accompanied by the appearance and disappearance of corner states in a finite hexagonal supercell. Such a geometry-induced band inversion is characterized by a sign change in the Dirac mass of the topological interface states and holds potential for applications such as rainbow trapping. Furthermore, we experimentally demonstrate the corner states, which is a hallmark of higher-order topology, also depend critically on the trivial cladding. Our work highlights the crucial role of trivial claddings on the formation of topological boundary states, and offers a novel approach for their manipulation.
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Ukraine to turn tables in "first symmetric winter" as its drones overwhelm Russian air defenses - Euromaidan Press
https://euromaidanpress.com/2025/11/25/ukraine-to-turn-tables-in-first-symmetric-winter-as-its-drones-overwhelm-russian-air-defenses/

🇺🇦 #NowPlaying on KEXP's #MiddayShow
The Black Hollies:
🎵 Gloomy Monday Morning
#TheBlackHollies
https://theblackhollies.bandcamp.com/track/gloomy-monday-morning
https://open.spotify.com/track/7CAb90jLAZsUIRG3t1sPcN

Kraken launches a Mastercard-powered debit card with 1% cashback and multi-asset spending in the UK and EU as part of a global rollout of its Krak money app (James Hunt/The Block)
https://www.theblock.co/post/380354/kraken-krak-cashback-d…

and then you can always go on all the rides!
https://jorts.horse/@thePlaceThatMakesYouTraitful/115609005252794096

SLAM-Free Visual Navigation with Hierarchical Vision-Language Perception and Coarse-to-Fine Semantic Topological Planning
Guoyang Zhao, Yudong Li, Weiqing Qi, Kai Zhang, Bonan Liu, Kai Chen, Haoang Li, Jun Ma
https://arxiv.org/abs/2509.20739

SLAM-Free Visual Navigation with Hierarchical Vision-Language Perception and Coarse-to-Fine Semantic Topological Planning
Conventional SLAM pipelines for legged robot navigation are fragile under rapid motion, calibration demands, and sensor drift, while offering limited semantic reasoning for task-driven exploration. To deal with these issues, we propose a vision-only, SLAM-free navigation framework that replaces dense geometry with semantic reasoning and lightweight topological representations. A hierarchical vision-language perception module fuses scene-level context with object-level cues for robust semantic i…

Toto, nie jesteśmy chyba już w Polszczy.
#Śląsk

Pave Bank, which lets businesses manage both fiat and digital assets in real time, raised a $39M Series A led by Accel, with Tether and others participating (RT Watson/The Block)
https://www.theblock.co/post/375874/tether-joins-39-million-f…

Fast and length-independnt transport time supported by topological edge states in finite-size Su-Schieffer-Heeger chains
Yu-Han Chang, Nadia Daniela Rivera Torres, Santiago Figueroa Manrique, Raul A. Robles Robles, Vanna Chrismas Silalahi, Cen-Shawn Wu, Gang Wang, Giulia Marcucci, Laura Pilozzi, Claudio Conti, Ray-Kuang Lee, Watson Kuo
https://arxiv.org/abs/2511.19237 https://arxiv.org/pdf/2511.19237 https://arxiv.org/html/2511.19237
arXiv:2511.19237v1 Announce Type: new
Abstract: In order to transport information with topological protection, we explore experimentally the fast transport time using edge states in one-dimensional Su-Schrieffer-Heeger (SSH) chains. The transport time is investigated in both one- and two-dimensional models with topological non-trivial band structures. The fast transport is inherited with the wavefunction localization, giving a stronger effective coupling strength between the mode and the measurement leads. Also the transport time in one-dimension is independent of the system size. To verify the asertion, we implement a chain of split-ring resonators and their complementary ones with controllable hopping strengths. By performing the measurements on the group delay of non-trivially topological edge states with pulse excitations, the transport time between two edge states is directly observed with the chain length up to $20$. Along the route to harness topology to protect optical information, our experimental demonstrations provide a crucial guideline for utilizing photonic topological devices.
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Nanoimprinted topological laser in the visible
Qiang Zhang, Rui Duan, Yutian Ao, Lin Wang, Xuehong Zhou, Xuyong Yang, Xiao-Cong Yuan, Baile Zhang, Handong Sun
https://arxiv.org/abs/2509.20879

Nanoimprinted topological laser in the visible
Nanoimprint lithography (NIL) is a widely used high-throughput fabrication technique for photonic devices, yet its reliability is often compromised by the inevitable imperfections that arise during the demolding process. Topological photonics, which harnesses topologically nontrivial structures to support defect-robust photonic states, offers a promising solution to this challenge. Here, we demonstrate a topological laser that is one-step nanoimprinted upon colloidal perovskite nanocrystals. Th…