Results 131 to 140 of about 401,472 (327)

Phase Topology Stability of an Optical Vortex via an Electrically Controlled Twist‐Planar Oriented Liquid Crystal Fresnel Lens

open access: yesAdvanced Optical Materials, EarlyView.
A simple and efficient method for determining the stability of optical vortices via Fourier transform using a conventional spherical lens is presented. The theoretical and experimental results demonstrate a practical approach to directly and unambiguously measure the magnitude and sign of the topological charge of a beam without altering an ...
Elena Melnikova   +5 more
wiley   +1 more source

High energy neutrino astronomy with MACRO [PDF]

open access: yes
A large area underground detector with accurate muon tracking and directionality can be used for the search of extraterrestrial sources of high energy neutrinos.
Auriemma, G.
core   +1 more source

Enhanced four-body decays of charged Higgs bosons into off-shell pseudoscalar Higgs and $$W^\pm $$ W ± boson pairs in a lepton-specific 2-Higgs doublet model

open access: yesEuropean Physical Journal C: Particles and Fields
We study the time-honoured decay $$H^\pm \rightarrow A W^\pm $$ H ± → A W ± but for the first time, we do so for the case of both A and $$W^\pm $$ W ± being off-shell, therefore computing a $$1\rightarrow 4$$ 1 → 4 body decay.
Stefano Moretti, Muyuan Song
doaj   +1 more source

Ultrabroadband Excitation of Hot Carriers in Plasmonic Nanorods Revealed by Two‐Dimensional Electronic Spectroscopy

open access: yesAdvanced Optical Materials, EarlyView.
This work dissects the ultrafast response of polydisperse plasmonic nanorods using two‐dimensional electronic spectroscopy, uniquely combining temporal and spectral resolution. Our ultrabroadband pulses cover both transverse and longitudinal nanorods’ resonances, revealing sub‐200‐fs dynamics and distinct broadening mechanisms.
Andrea Schirato   +8 more
wiley   +1 more source

Unlocking Two‐Photon Chiral Signatures in DNA‐Stabilized Silver Nanoclusters: Two‐Photon Circular Dichroism and Circularly Polarized Luminescence

open access: yesAdvanced Optical Materials, EarlyView.
Chiroptical properties of DNA‐stabilized silver nanocluster (DNA)2​[Ag16​Cl2​]8+ are presented in linear and nonlinear regime. These water‐soluble, NIR‐emitting nanoprobes demonstrate exceptionally high two‐photon circular dichroism and circularly polarized luminescence brightness.
Karolina Sulowska   +3 more
wiley   +1 more source

Probing the Connection between IceCube Neutrinos and MOJAVE AGN

open access: yesThe Astrophysical Journal
Active galactic nuclei (AGN) are prime candidate sources of the high-energy, astrophysical neutrinos detected by IceCube. This is demonstrated by the real-time multimessenger detection of the blazar TXS 0506+056 and the recent evidence of neutrino ...
R. Abbasi   +423 more
doaj   +1 more source

Excitonic Landscapes in Monolayer Lateral Heterostructures Revealed by Unsupervised Machine Learning

open access: yesAdvanced Optical Materials, EarlyView.
Hyperspectral photoluminescence data from graded MoxW1 − xS2 alloys and monolayer MoS2–WS2 lateral heterostructures are analyzed using unsupervised machine learning. The combined use of PCA, t‐SNE, and DBSCAN uncovers distinct excitonic regions that trace how composition, strain, and defects modulate optical responses in these 2D materials.
Maninder Kaur   +4 more
wiley   +1 more source

The generalized scalar weak gravity conjecture and its implications

open access: yesPhysics Letters B
We propose a generalized formulation of the Scalar Weak Gravity Conjecture (SWGC) based on the analogy with the derivation of the Gauge Weak Gravity Conjecture (GWGC).
Fayez Abu-Ajamieh   +2 more
doaj   +1 more source

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