Tootfinder

Linsen in VR-Brillen: Zwischen Schärfe, Gewicht und optischen Nebenwirkungen
Fresnel, Pancake oder asphärisch: In VR-Brillen steckt viel optisches Know-how, doch die Wahl der richtigen Linse bleibt ein Kompromissgeschäft.

Sources: DeepSeek plans to use Huawei's Ascend AI chips to train smaller versions of its upcoming R2 models but will still use Nvidia chips for largest models (The Information)
https://www.theinformation.com/articles/deepseek-opts-huawei-chips-train-models…

DeepSeek Opts for Huawei Chips to Train Some Models
DeepSeek, one of China’s leading artificial intelligence developers, has decided to use Huawei Technologies’ AI chips to train some of its AI models, a sign it is reducing its reliance on Nvidia chips, according to three people with knowledge of the effort. The move follows pressure by the ...

Narrow beam and low-sidelobe two-dimensional beam steering on thin-film lithium niobate optical phased array
Yang Li, Shiyao Deng, Xiao Ma, Ziliang Fang, Shufeng Li, Weikang Xu, Fangheng Fu, Xu Ouyang, Yuming Wei, Tiefeng Yang, Heyuan Guan, Huihui Lu
https://arxiv.org/abs/2506.22124

Narrow beam and low-sidelobe two-dimensional beam steering on thin-film lithium niobate optical phased array
Optical beam steering has become indispensable in free-space optical communications, light detection and ranging (LiDAR), mapping, and projection. Optical phased array (OPA) leads this field, yet conventional versions still suffer from a narrow steering field of view (FOV), insufficient sidelobe suppression, and limited angular resolution. Thin-film lithium niobate (LN), with its strong Pockels electro-optic (EO) effect, offers a powerful integrated-photonics platform to overcome these limitati…

Efficient single-atom transfer from an optical conveyor belt to a tightly confined optical tweezer
Lei Xu, Ling-Xiao Wang, Guang-Jie Chen, Zhu-Bo Wang, Xin-Biao Xu, Guang-Can Guo, Chang-Ling Zou, Guo-Yong Xiang
https://arxiv.org/abs/2507.21456 https://arxiv.org/pdf/2507.21456 https://arxiv.org/html/2507.21456
arXiv:2507.21456v1 Announce Type: new
Abstract: Efficient loading of single atoms into tightly confined traps is crucial for advancing quantum information processing and exploring atom-photon interactions. However, directly loading atoms from a magneto-optical trap (MOT) into static tweezers in cavity-based systems and hybrid atom-photon interfaces remains a challenge. Here, we demonstrate atom loading in a tightly confined optical tweezer 0.6mm away from MOT by an optical conveyor belt. By employing real-time feedback control of the atom number in the overlapping region between the conveyor belt and the tweezer, we enhance a single-atom loading probability to 77.6%. Our technique offers a versatile solution for deterministic single-atom loading in various experimental settings and paves the way for diverse applications based on hybrid photonic-atom structures.
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Quantum Theory of Optical Spin Texture in Chiral Tellurium Lattice
Pronoy Das, Sathwik Bharadwaj, Jungho Mun, Xueji Wang, Junsuk Rho, Zubin Jacob
https://arxiv.org/abs/2506.21610 …

Quantum Theory of Optical Spin Texture in Chiral Tellurium Lattice
The absence of inversion symmetry in chiral tellurium (Te) creates exotic spin textures within its electron waves. However, understanding textured optical waves within Te remains a challenge due to the semi-classical limitations of long-wavelength approximation. To unveil these textured optical waves, we develop a spin-resolved deep-microscopic optical bandstructure for Te analogous to its electronic counterpart. We demonstrate that the degeneracies in this optical bandstructure is lifted by th…

Baupolizei wird aktiv - Obdachloser schläft in Koje hinter Spielgeschäft #News #Nachrichten

Replaced article(s) found for physics.optics. https://arxiv.org/list/physics.optics/new
[1/1]:
- Anderson localization of light by impurities in a solid transparent matrix
S. E. Skipetrov, I. M. Sokolov

Replaced article(s) found for physics.optics. https://arxiv.org/list/physics.optics/new
[1/1]:
- Topology optimization of a superabsorbing thin-film semiconductor metasurface
Johannes Gedeon, Izzatjon Allayarov, Emadeldeen Hassan, Antonio Cal\`a Lesina

Excited State Absorption Drives Low-Energy Optical Limiting in Oligothiophenes
Mustapha Driouech, Michele Guerrini, Caterina Cocchi
https://arxiv.org/abs/2507.21578 https://

Excited State Absorption Drives Low-Energy Optical Limiting in Oligothiophenes
Optical limiting (OL), a crucial mechanism for protecting human eyes and sensitive sensors from intense radiation, relies on understanding the optical nonlinearities acting on the systems. Assessing and disentangling the effects at play is crucial to predict and control the nonlinear optical response in real materials. In this ab initio study based on real-time time-dependent density-functional theory, we investigate non-perturbatively the absorption spectra of a set of thiophene oligomers, the…

Controlling X-ray emission with optical nanostructures
Elina Sendonaris, Jamison Sloan, Nicholas Rivera, Ido Kaminer, Marin Solja\v{c}i\'c
https://arxiv.org/abs/2507.22302 h…

Controlling X-ray emission with optical nanostructures
Nonlinear processes lie at the heart of many technologies such as frequency converters and entangled photon sources. Historically, observation and manipulation of these processes, for instance through nanostructures, has been limited to optical and lower frequencies. Recently, however, second-order nonlinear processes which couple X-ray and optical photons have been observed and used to probe the electronic structure and optical response of materials. Observing and controlling these processes r…