Results 61 to 70 of about 23,920 (290)

Silver Nanoparticles under Nanosecond Pulsed Laser Excitation as an Intensity Sensitive Saturable Absorption to Reverse Saturable Absorption Switching Material

Photonics, 2021
Optical nonlinearity involved switching draws an important consideration in nonlinear optical studies. Based on that, we explored nonlinear absorption processes in silver nanoparticles synthesized by liquid phase laser ablation technique employing a ...
Edappadikkunnummal Shiju, Kaniyarakkal Sharafudeen, T. M. Remya, N. K. Siji Narendran, Palengara Sudheesh, Vijayakumar Sadasivan Nair   +5 more
doaj   +1 more source

Vector Dissipative Solitons in Graphene Mode Locked Fiber Lasers

, 2010
Vector soliton operation of erbium-doped fiber lasers mode locked with atomic layer graphene was experimentally investigated. Either the polarization rotation or polarization locked vector dissipative solitons were experimentally obtained in a dispersion-
Akhmediev, Akhmediev, Bale, Bao, Bao, Cabasse, Chang, Chen, Dennis, Dingyuan Tang, Duling, Geim, Han Zhang, Kalashnikov, Kalashnikov, Kian Ping Loh, Kieu, Komarov, Liu, Luming Zhao, Mesentsev, Mollenauer, Nair, Qiaoliang Bao, Renninger, Song, Tang, Turitsyn, Wise, Zavyalov, Zhang, Zhang, Zhang, Zhang, Zhang, Zhao   +35 more
core   +1 more source

Coherent instabilities in a semiconductor laser with fast gain recovery [PDF]

, 2006
We report the observation of a coherent multimode instability in quantum cascade lasers (QCLs), which is driven by the same fundamental mechanism of Rabi oscillations as the elusive Risken-Nummedal-Graham-Haken (RNGH) instability predicted 40 years ago ...
A. Belyanin, A. Gordon, A. Yariv, A. Z. Grasiuk, C. Jirauschek, Christine Y. Wang, D. Bour, F. X. Kärtner, Federico Capasso, G. Höfler, H. Fu, H. Haken, H. Haken, J. Faist, L. Allen, L. Diehl, M. Troccoli, R. W. Boyd, S. Corzine, T. Voigt, Ya. I. Khanin   +20 more
core   +2 more sources

The Role of Calcitonin Gene‐Related Peptide in High‐Altitude Headache: A Prospective Field Study

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective High‐altitude headache (HAH) is a common neurological condition associated with rapid ascent to high altitude. The pathophysiological mechanisms underlying HAH remain incompletely understood. Calcitonin gene‐related peptide (CGRP), a neuropeptide implicated in migraine pathophysiology, may play a key role in the pathophysiology of ...
Roman Schniepp, Ludwig Karrasch, Helena Breitenstein, Andreas Straube, Katharina Kamm   +4 more
wiley   +1 more source

Clinical Significance of Therapeutic Drug Level Monitoring for Mycophenolate in Patients with Extra‐Renal Systemic Lupus Erythematosus – A Systematic Review & Meta‐analysis

Arthritis Care &Research, Accepted Article.
Background Clinical response to Mycophenolic acid (MPA) is highly heterogeneous; thus, therapeutic drug monitoring (TDM) may help improve treatment efficacy. This systematic review and meta‐analysis examined therapeutic ranges for MPA levels associated with better outcomes and safety in patients with SLE, particularly those with extra‐renal ...
Zahraa Qamhieh, Dalia Sriwi, Callie Saric, Tripti Singh, Christie M. Bartels, Shivani Garg   +5 more
wiley   +1 more source

Reconfigurable nonlinear losses of nanomaterial covered waveguides

Nanophotonics, 2023
Optical waveguides covered with thin films, which transmittance can be controlled by external action, are widely used in various applications from optical modulators to saturable absorbers.
Davletkhanov Ayvaz, Mkrtchyan Aram, Bunkov Alexey, Chermoshentsev Dmitry, Shashkov Mikhail, Ilatovskii Daniil, Krasnikov Dmitry, Nasibulin Albert, Gladush Yuriy   +8 more
doaj   +1 more source

Dispersion-induced dynamics of coupled modes in a semiconductor laser with saturable absorption [PDF]

, 2014
We present an experimental and theoretical study of modal nonlinear dynamics in a specially designed dual-mode semiconductor Fabry-Perot laser with a saturable absorber.
O'Brien, Stephen, O'Callaghan, Finbarr, Osborne, Simon   +2 more
core   +2 more sources

Theory of graphene saturable absorption [PDF]

Physical Review B, 2017
Saturable absorption is a non-perturbative nonlinear optical phenomenon that plays a pivotal role in the generation of ultrafast light pulses. Here we show that this effect emerges in graphene at unprecedentedly low light intensities, thus opening avenues to new nonlinear physics and applications in optical technology.
Marini, Andrea, Cox, J. D., García De Abajo, F. J.   +2 more
openaire   +3 more sources

Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur, Faruk Kaya, Bora Derin, Mustafa Lütfi Öveçoğlu, Ju Li, Duygu Ağaoğulları   +5 more
wiley   +1 more source

Nonlinear terahertz devices utilizing semiconducting plasmonic metamaterials

, 2015
The development of responsive metamaterials has enabled the realization of compact tunable photonic devices capable of manipulating the amplitude, polarization, wave vector, and frequency of light. Integration of semiconductors into the active regions of
Averitt, Richard D., Bank, Seth R., Fan, Kebin, Keiser, George R., Maddox, Scott J., Seren, Huseyin R., Zhang, Jingdi, Zhang, Xin, Zhao, Xiaoguang   +8 more
core   +1 more source