Results 131 to 140 of about 27,968 (274)

Room Temperature Anisotropic Photoresponse in Low‐Symmetry Van der Waals Semiconductor CrPS4

Advanced Optical Materials, Volume 14, Issue 22, 12 June 2026.
ABSTRACT The crystalline and optical anisotropy of low‐symmetry 2D materials can enable strong dichroic responses, enhancing polarization contrast for photonic and optoelectronic devices. Here, we unveil pronounced optical and optoelectronic anisotropy in chromium thiophosphate (CrPS4) arising from the strong coupling between light polarization and its
Cédric A. Cordero‐Silis, Daniel Vaquero, Teresa López‐Carrasco, Harshan Madeshwaran, Marcos H. D. Guimarães   +4 more
wiley   +1 more source

Centimeter-size achromatic metalens in long-wave infrared

Nanophotonics
Metalens has shown its significantly ultra-light and ultra-thin features. However, large-aperture achromatic metalens is constrained by both maximum dispersion range and computational memory.
Zhao Fen, Zhao Changchun, Zhang Yuqing, Chen Jie, Li Shaoqi, Zhou Wangzhe, Ran Chongchong, Zeng Yongcan, Chen Huan, He Xin, Wu Jiagui, Zhu Gangyi, Yang Junbo   +12 more
doaj   +1 more source

Highly Efficient Broadband Achromatic Microlens Design Based on Low-Dispersion Materials

Engineering
Metalenses with achromatic performance offer a new opportunity for high-quality imaging with an ultra-compact configuration; however, they suffer from complex fabrication processes and low focusing efficiency.
Xueqian Wang, Chuanbao Liu, Feilou Wang, Weijia Luo, Chengdong Tao, Yuxuan Hou, Lijie Qiao, Ji Zhou, Jingbo Sun, Yang Bai   +9 more
doaj   +1 more source

Evolution and Conceptual Insights into the Geometric Phase of Light: A Comprehensive Review

Advanced Photonics Research, Volume 7, Issue 6, June 2026.
This review presents a unified account of the geometric phase of light, linking its fundamental principles to diverse manifestations in polarization, spatial, and vector modes. By connecting theoretical frameworks with key experimental realizations, it reveals a coherent physical picture that deepens understanding and stimulates new directions in ...
A. Srinivasa Rao
wiley   +1 more source

Neighborhood-Restricted Achromatic Colorings of Graphs

, 2016
A (closed) neighborhood-restricted 2-achromatic-coloring of a graph G is an assignment of colors to the vertices of G such that no more than two colors are assigned in any closed neighborhood. In other words, for every vertex v in G, the vertex v and its
Chandler, James D., Sr.
core  

Selectivity of human retinotopic visual cortex to S-cone-opponent, L/M-cone-opponent and achromatic stimulation

, 2007
Our aim was to make a quantitative comparison of the response of the different visual cortical areas to selective stimulation of the two different cone-opponent pathways [long- and medium-wavelength (L/M)- and short-wavelength (S)-cone-opponent] and the ...
McMahon, Katie L., McMahon, K. L., de Zubicaray, Greig I., Hess, Robert F., Mullen, K. T., Dumoulin, Serge O., de Zubicaray, G. I., Hess, R. F., Mullen, Kathy T., Dumoulin, S. O.   +9 more
core   +1 more source

Broadband Reflective Terahertz Quarter‐Wave Metasurface Enabled by Two‐Photon Polymerization 3D‐Printing

Advanced Photonics Research, Volume 7, Issue 6, June 2026.
A compact reflective terahertz quarter‐wave metasurface fabricated via 2PP‐3D printing method is experimentally demonstrated near 1 THz frequency. Broadband linear‐to‐circular polarization conversion is achieved over 0.75–1.30 THz (∼54% fractional bandwidth), with axial ratio below 3 dB and ellipticity approaching −1.
Anjali Chaudhary, Anju Sajan, Rohit Chikkaraddy, Sunil Kumar, Ravendra Kumar Varshney, Miguel Navarro‐Cía   +5 more
wiley   +1 more source

Automatic search for cemented doublets using the saddle point construction method

Journal of the European Optical Society-Rapid Publications
Conventional optical design relies on iterative and time-consuming optimization methods. Finding the right starting system facilitates the design of relevant optical systems.
Maurey Hugo, Twardowski Patrice, Pierron Robin, Gérard Philippe, Flury Manuel   +4 more
doaj   +1 more source

Pollination by long‐proboscid horseflies and its implications for reproductive isolation among coflowering Satyrium orchids in South Africa

American Journal of Botany, Volume 113, Issue 6, June 2026.
Abstract Premise Floral adaptations to pollinators can drive lineage diversification and promote coexistence of species. We investigated the reproductive biology of Satyrium longicolle, a South African orchid that we hypothesized to belong to a long‐proboscid horsefly pollination guild and examined overlap of pollinators and floral traits among ...
Steven D. Johnson, Matthew Moir, Ethan Newman, Timotheüs Van der Niet   +3 more
wiley   +1 more source

Repeating Nuclear Transients From Repeating Partial Tidal Disruption Events

Astronomische Nachrichten, Volume 347, Issue 5, June 2026.
ABSTRACT Extragalactic nuclear transients that exhibit repeating outbursts can be modeled as the repeated dynamical interaction between bound stars and supermassive black holes (SMBHs). A subset of these transients, with recurrence timescales of months‐to‐years, have been explained as accretion flares from the repeated tidal stripping of a star by an ...
Ananya Bandopadhyay, Eric R. Coughlin, Julia Fancher, C. J. Nixon, Dheeraj R. Pasham   +4 more
wiley   +1 more source