Results 81 to 90 of about 27,968 (274)
A broadband achromatic polarization-insensitive metalens consisting of anisotropic nanostructures [PDF]
Nature Communications, 2018 Metasurfaces have attracted widespread attention due to an increasing demand of compact and wearable optical devices. For many applications, polarization-insensitive metasurfaces are highly desirable, and appear to limit the choice of their constituent ...
W. T. Chen +4 more
semanticscholar +1 more source
Observation of Excitonic Instability in a Monolayer Ta2NiSe5 With Strain Disorder
Advanced Science, EarlyView.Monolayer Ta2${\rm Ta}_2$NiSe5${\rm NiSe}_5$ sustains an excitonic insulating phase up to 190 K, with Raman signatures of gap opening and critical excitonic fluctuations. Thickness‐independent large gap ratios highlight strong exciton‐phonon coupling, while substrate‐induced strain disorder depresses Tc, establishing monolayer Ta2${\rm Ta}_2$NiSe5${\rm
So Young Kim +13 more
wiley +1 more source
Achromatic number of fragmentable graphs
, 2010 A complete coloring of a simple graph G is a proper vertex coloring such that each pair of colors appears together on at least one edge. The achromatic number psi(G) is the greatest number of colors in such a coloring.
Edwards, Keith, Keith Edwards
core +1 more source
TRIM: Simultaneous Thermometry, Ranging, and Imaging via a Monolithic Metalens
Advanced Science, EarlyView.ABSTRACT While metasurfaces offer a pathway beyond the discrete architectures of conventional LWIR systems, physically fusing high‐precision thermometry and passive ranging onto a single metalens remains a formidable challenge. Here, we demonstrate a monolithic, dual‐focus metalens capable of simultaneous multidimensional sensing.
Man Yuan +10 more
wiley +1 more source
achromatic and chromatic contrasts
, 2018 achromatic and chromatic contrasts between lizard dorsal surface and selected ...
David Chapple (3364979) +13 more
core +1 more source
All-Chalcogenide High-NA Broadband Achromatic Metalens for Long-Wavelength Infrared Regime
PhotonicsThe long-wave infrared band, which at room temperature covers the infrared radiation of humans and objects, has significant applications across various fields including wireless communication, national defense, military, biomedical, and advanced driver ...
Minsi Lin +9 more
doaj +1 more source
High-NA achromatic metalenses by inverse design. [PDF]
Optics Express, 2019 We use inverse design to discover metalens structures that exhibit broadband, achromatic focusing across low, moderate, and high numerical apertures. We show that standard unit-cell approaches cannot achieve high-efficiency high-NA focusing, even at a ...
Haejun Chung, O. Miller
semanticscholar +1 more source
Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.Herein, a patient‐mounted neuro optical coherence tomography system that integrates a 5 degrees‐of‐freedom skull‐mounted robot (Skullbot) with a 0.6 mm neuroendoscope for targeted, minimally invasive deep brain imaging, is developed. The system offers high‐resolution imaging with precise deployment, demonstrated through successful tumor imaging in a ...
Chao Xu +7 more
wiley +1 more source
Chromatic and achromatic contrasts.
, 2014 Pair-wise comparisons in Ischnura heterosticta under twilight and morning irradiance (mean ± s.d.). Jnd value: ‘just noticeable differences’ used as discrimination index; a jnd value of 1 has been set as discrimination threshold value (dashed line) (A ...
Judith Reinhard (253344) +3 more
core +1 more source
Error analysis of polarization imaging system based on Mueller matrix
Physics OpenThis study investigates the influence mechanisms of achromatic and non-achromatic properties on polarization detection errors in polarization imaging technology. Its primary objective is to quantitatively analyze how retarder thickness, retarder material,
Juncai He, Tingyu Yan, Yi Chen
doaj +1 more source