Results 61 to 70 of about 300,028 (288)

Ultrabroadband Optical Phenomena in Quadratic Nonlinear Media

IEEE Photonics Journal, 2010
We present a comprehensive framework to study the nonlinear evolution of ultrabroadband optical pulses in quadratic nonlinear media. We employ a nonlinear envelope equation that goes beyond the traditional slowly varying approximation and allows ...
M. Conforti, F. Baronio, C. De Angelis
doaj   +1 more source

A light‐triggered Time‐Resolved X‐ray Solution Scattering (TR‐XSS) workflow with application to protein conformational dynamics

FEBS Open Bio, EarlyView.
Time‐resolved X‐ray solution scattering captures how proteins change shape in real time under near‐native conditions. This article presents a practical workflow for light‐triggered TR‐XSS experiments, from data collection to structural refinement. Using a calcium‐transporting membrane protein as an example, the approach can be broadly applied to study ...
Fatemeh Sabzian‐Molaei, Fredrik Orädd, Konstantinos Magkakis, Magnus Andersson   +3 more
wiley   +1 more source

Boosting and Taming Wave Breakup in Second Harmonic Generation

Frontiers in Physics, 2021
Modulation instability is a universal phenomenon that can be found in a wide variety of nonlinear systems where, in the presence of a noise seed, peaks of random intensities can be generated. Several dynamical systems admit exact solutions in the form of
Raphaël Jauberteau, Raphaël Jauberteau, Sahar Wehbi, Sahar Wehbi, Tigran Mansuryan, Katarzyna Krupa, Fabio Baronio, Benjamin Wetzel, Alessandro Tonello, Stefan Wabnitz, Vincent Couderc   +10 more
doaj   +1 more source

Quadratic phase matching in slot waveguides [PDF]

, 2006
We analyze phase matching with reference to frequency doubling in nanosized quadratic waveguides encompassing form birefringence and supporting cross-polarized fundamental and second-harmonic modes.
Afromovitz, Andrea Di Falco, Armstrong, Assanto, Claudio Conti, Combrié, D'Aguanno, DeRossi, DiFalco, Ding, Fejer, Fiore, Franken, Gaetano Assanto, Kotlyar, Moutzouris, Ravaro, Raybaut, Van der Ziel, Vella, Xu   +20 more
core   +2 more sources

Shared Genetic Effects and Antagonistic Pleiotropy Between Multiple Sclerosis and Common Cancers

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Epidemiologic studies have reported inconsistent altered cancer risk in individuals with multiple sclerosis (MS). Factors such as immune dysregulation, comorbidities, and disease‐modifying therapies may contribute to this variability.
Asli Buyukkurt, Marius Ygonia, Ali Manouchehrinia, Philippe Lefrançois, Ingrid Kockum, Adil Harroud   +5 more
wiley   +1 more source

Second harmonic generation in SiC polytypes

, 1997
LMTO calculations are presented for the frequency dependent second harmonic generation (SHG) in the polytypes 2H, 4H, 6H, 15R and 3C of SiC. All independent tensor components are calculated.
A. P. Verma, B. F. Levine, B. Wenzien, Benjamin Segall, C. Aversa, D. A. Kleinman, D. A. Kleinman, D. A. Roberts, E. Biedermann, G. L. Harris, G. S. Zhdanov, J. Chen, J. Chen, J. E. Sipe, J. L. P. Hughes, J. L. P. Hughes, K. Kim, K. Kim, L. Hedin, L. Hedin, L. Patrick, M. Cardona, M. Rohlfing, O. K. Andersen, O. K. Andersen, P. M. Lundquist, P. M. Lundquist, P. M. Lundquist, R. C. Miller, R. C. Miller, R. M. Martin, S. Logothetidis, S. N. Rashkeev, S. Singh, Sergey N. Rashkeev, V. I. Gavrilenko, W. G. Aulbur, W. H. Backes, W. H. Backes, W. J. Choyke, W. Kohn, W. R. L. Lambrecht, W. R. L. Lambrecht, W. R. L. Lambrecht, W. R. L. Lambrecht, W. van Haeringen, Walter R. L. Lambrecht, Z. H. Levine, Z. H. Levine, Z. H. Levine, Z. Ikonić   +50 more
core   +1 more source

Unraveling the Molecular Mechanisms of Glioma Recurrence: A Study Integrating Single‐Cell and Spatial Transcriptomics

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Glioma recurrence severely impacts patient prognosis, with current treatments showing limited efficacy. Traditional methods struggle to analyze recurrence mechanisms due to challenges in assessing tumor heterogeneity, spatial dynamics, and gene networks.
Lei Qiu, Yinjiao Fei, Jiaxuan Ding, Kexin Shi, Jinyan Luo, Yuchen Zhu, Xingjian Sun, Gefei Jiang, Yuandong Cao, Weilin Xu, Shu Zhou   +10 more
wiley   +1 more source

Clustering Algorithm Reveals Dopamine‐Motor Mismatch in Cognitively Preserved Parkinson's Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To explore the relationship between dopaminergic denervation and motor impairment in two de novo Parkinson's disease (PD) cohorts. Methods n = 249 PD patients from Parkinson's Progression Markers Initiative (PPMI) and n = 84 from an external clinical cohort.
Rachele Malito, Chiara Meneghini, Alice Galli, Luca Gallo, Pierfrancesco Mitrotti, Paola Dimartino, Marianna Inglese, Cinzia Zatti, Alessandro Lupini, Andrea Pilotto, Alessandro Padovani, Micol Avenali, Enza Maria Valente, Cristina Tassorelli, Silvia P. Caminiti   +14 more
wiley   +1 more source

Quadrupole second harmonic generation and sum-frequency generation in ZnO quantum dots

AIP Advances, 2015
The second harmonic generation (SHG) and the sum frequency generation (SFG) processes are investigated in the conduction band states of the singly charged ZnO quantum dot (QD) embedded in the HfO2, and the AlN matrices.
Deepti Maikhuri, S. P. Purohit, K. C. Mathur   +2 more
doaj   +1 more source

Nonlinear Fano Profiles in the Optical Second-Harmonic Generation from Silver Nanoparticles

, 2012
The resonance effects on the optical second harmonic generation from 140 nm silver nanoparticles is studied experimentally by hyper-Rayleigh scattering and numerically by finite element method calculations.
Bachelier, G., Benichou, E., Bertorelle, F., Brevet, P. -F., Butet, J., Jonin, C., Lascoux, N., Mosset, A., Russier-Antoine, I.   +8 more
core   +1 more source