Results 1 to 10 of about 855 (130)

Interpreting synchrotron infrared nano-spectra of hydroxyapatite through Kramers-Kronig relations and complex Lorentzian oscillators [PDF]

open access: yesScientific Reports
This study introduces a hybrid numerical-analytical methodology for interpreting, for the first time, both the amplitude and phase of Synchrotron Infrared Nanospectroscopy (SINS) spectra of hydroxyapatite (HA) thin films.
Edher Z. Herrera   +5 more
doaj   +2 more sources

Complex Refractive Index Spectrum of CsPbBr3 Nanocrystals via the Effective Medium Approximation [PDF]

open access: yesNanomaterials
We have estimated the intrinsic complex refractive index spectrum of a CsPbBr3 nanocrystal. With various dilute solutions of CsPbBr3 nanocrystals dissolved in toluene, effective refractive indices were measured at two different wavelengths using ...
Sang-Hyuk Park   +5 more
doaj   +2 more sources

Topology-Enabled Finite-Band Absorption Framework Based on a Bioinspired Nested Dual-Loop Architecture. [PDF]

open access: yesAdv Sci (Weinh)
A nuclear‐pore‐inspired nested dual‐loop architecture redistributes electromagnetic energy through coupled transport, confinement, and dissipation pathways. Integrated with Co/Fe3O4 dual‐magnetic composites and topology optimization, the 11‐mm‐thick absorber delivers continuous 2–40 GHz attenuation, raises finite‐band structural utilization to 82%, and
Liu S   +6 more
europepmc   +2 more sources

Better resolved low frequency dispersions by the apt use of Kramers-Kronig relations, differential operators and all-in-1 modelling [PDF]

open access: yesFrontiers in Chemistry, 2016
The dielectric spectra of colloidal systems often contain a typical low frequency dispersion, which usually remains unnoticed, because of the presence of strong conduction losses. The KK relations offer a means for converting  into  data. This allows
Jan van Turnhout
doaj   +2 more sources

Giant Magneto-Optical Effects in Two-Dimensional Flat-Band Antiferromagnets. [PDF]

open access: yesAdv Sci (Weinh)
RuOCl2${\rm RuOCl}{_2}$, a two‐dimensional antiferromagnet, hosts energy bands with pronounced directional flatness. This study demonstrates that the flat‐band‐induced optical transitions yield strongly anisotropic absorption and a record‐large magneto‐optical Schafer–Hubert effect, alongside exceptional linear dichroism exceeding 50%.
Yang P   +7 more
europepmc   +2 more sources

The investigation of the optical and morphological properties of metal iron oxide-based Fe2O3-WO3-ZrO2 and Fe2O3-WO3 nanocomposites [PDF]

open access: yesScientific Reports
Iron oxide nanocomposites Fe2O3-WO3 and Fe2O3-WO3-ZrO2 were effectively synthesized in this study using the solid-state reaction technique and using Tauc plot analysis of diffuse reflectance spectroscopic data in the 350–700 nm spectral range, the ...
Roghayeh Gozali Balkanloo   +1 more
doaj   +2 more sources

Harnessing the Missing Spectral Correlation for Metasurface Inverse Design [PDF]

open access: yesAdvanced Science
A long‐held tenet in computer science asserts that the training of deep learning is analogous to an alchemical furnace, and its “black box” signature brings forth inexplicability.
Jie Zhang   +6 more
doaj   +2 more sources

Polarization-aware UAV deployment for reliable MIMO communication in forested environments. [PDF]

open access: yesPLoS ONE
Unmanned Aerial Vehicles (UAVs) equipped with Multiple-Input Multiple-Output (MIMO) communication systems are increasingly deployed to restore or extend connectivity in forested and remote regions where terrestrial infrastructure is unavailable. However,
Mohamed Shalaby
doaj   +2 more sources

BIREFRINGENCE AND EXCITON SPECTRA OF CuAlSe2 AND CuAlS2 CRYSTALS [PDF]

open access: yesJournal of Engineering Science (Chişinău), 2020
The excitonic reflection spectra of CuAlS2 and CuAlSe2 crystals were measured at the temperature of 10 K for polarizations E||c and E⊥c. Ground and excited states of the excitons were found out in the investigated spectra.
Maşnic, Alisa
doaj   +1 more source

High Bandwidth‐Utilization Digital Holographic Multiplexing: An Approach Using Kramers–Kronig Relations

open access: yesAdvanced Photonics Research, 2022
Modern quantitative optical imaging is developing toward high throughput and powerful data processing capabilities. Holography is a powerful technique to characterize quantitative phase delays introduced by light–matter interactions.
Zhengzhong Huang, Liangcai Cao
doaj   +1 more source

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