Results 71 to 80 of about 25,220 (299)

Optical Lattice Trap for Kerr Solitons

, 2017
We show theoretically and numerically that dichromatic pumping of a nonlinear microresonator by two continuous wave coherent optical pumps creates an optical lattice trap that results in the localization of intra-cavity Kerr solitons with soliton ...
Maleki, Lute, Matsko, Andrey B., Taheri, Hossein   +2 more
core   +1 more source

Short‐Wavelength Infrared Imaging with Organic Photodetectors Based on Non‐Fullerene Acceptors with Detection above 1200 nm

Advanced Materials, EarlyView.
Solution‐processed organic photodetectors (OPDs) based on two novel low band gap non‐fullerene acceptors BZIC‐2F and BZIC‐2Cl, when blended with common polymer donor P3HT, extend detection range beyond 1200 nm with superior performance, rivaling costly inorganic sensors and past literature.
Zhuoran Qiao, Sandeep Sharma, Yakun He, Marie Houot, Kun‐Han Lin, Davide Nodari, Filip Aniés, Matilde Brunetta, Patipan Sukpoonprom, Eunyoung Hong, Edoardo Angela, Zian Wang, Pichaya Pattanasattayavong, Martyn A. McLachlan, Artem Bakulin, Denis Andrienko, Frédéric Laquai, Martin Heeney, Nicola Gasparini   +18 more
wiley   +1 more source

Sub-picosecond Graphene-based Harmonically Mode-Locked Fiber Laser With Repetition Rates up to 2.22 GHz

EPJ Web of Conferences, 2013
Passive harmonic-mode locking (PHML) of erbium-doped fiber laser with multilayer graphene is presented. The laser could operate at several harmonics (from 2nd to 21st) of the fundamental repetition frequency of the ring resonator (106 MHz).
Abramski K.M., Sotor J., Sobon G.
doaj   +1 more source

Tunable Microwave Pulse Generation Based on an Actively Mode-Locked Optoelectronic Oscillator

Photonics, 2022
A tunable microwave-pulse-generation scheme is proposed and demonstrated by employing an actively mode-locked optoelectronic oscillator (OEO) based on a microwave photonic filter (MPF).
Jin Zhang, Depei Zhang, Maolong Zhang, Daikun Zheng, Anle Wang, Xiaotong Liu, Lei Hu, Xiaoniu Peng, Yalan Wang   +8 more
doaj   +1 more source

Resonant Domain Wall Dynamics in a Three‐Dimensional Magnetic Nano Double Helix

Advanced Materials, EarlyView.
3D magnetic nanostructures promise exciting possibilities for magnetization dynamics. However, experimental realizations remain scarce. In nanoprinted cobalt double helices, time‐resolved X‐ray microscopy reveals harmonic domain wall dynamics. Simulations identify the mode and additional higher‐frequency resonances, revealing a rich dynamic landscape ...
Pamela Morales‐Fernández, Iason Konstantinos‐Douveas, Claas Abert, Elina Zhakina, Sandra Ruiz‐Gómez, Claudia Fernández‐González, Luke Alexander Turnbull, Sebastian Wintz, Markus König, Simone Finizio, Markus Weigand, Naëmi Leo, Dieter Suess, Aurelio Hierro‐Rodríguez, Amalio Fernández‐Pacheco, Claire Donnelly   +15 more
wiley   +1 more source

Multi-Domain Modeling of Free-Running Harmonic Frequency Comb Formation in Terahertz Quantum Cascade Lasers

IEEE Photonics Journal
Optical frequency comb (OFC) emission in quantum cascade lasers (QCLs) is highly attractive for applications in metrology and sensing. Recently, coherent OFC mode-locking with large intermodal spacing was demonstrated in QCLs.
Johannes Popp, Lukas Seitner, Felix Naunheimer, Georg Janowski, Michael Haider, Christian Jirauschek   +5 more
doaj   +1 more source

Bright and Dark Square Pulses Generated From a Graphene-Oxide Mode-Locked Ytterbium-Doped Fiber Laser

IEEE Photonics Journal, 2014
The observation of the bright pulses and dark square pulses in a graphene-oxide saturable absorber (GOSA) passively mode-locked ytterbium-doped fiber laser has been investigated experimentally.
Rong-yong Lin, Yong-gang Wang, Pei-guang Yan, Ge-lin Zhang, Jun-qing Zhao, Hui-quan Li, Shi-sheng Huang, Guang-zhong Cao, Ji-an Duan   +8 more
doaj   +1 more source

Generation and Quenching of Intensity Pulsations in Semiconductor Lasers Coupled to External Cavities [PDF]

, 1980
The behavior of self-pulsing and nonpulsing lasers coupled to external cavities is investigated experimentally and theoretically. We investigate the dependence of the pulsation characteristics on the external cavity length using a saturable absorber ...
Figueroa, Luis, Lau, Kam Y., Yariv, Amnon   +2 more
core   +1 more source

Versatile Magneto‐Dielectric Response of Epitaxial Thin Films of the High Entropy Oxide Perovskite Nd(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3

Advanced Materials, EarlyView.
The magnetic high entropy oxide perovskite Nd(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3 exhibits a substantially large dielectric constant (εr) at room temperature, which shows distinct anionic and cationic contributions in the form of zero and finite bias peaks, respectively, down to its magnetic transition temperature (Tmag).
Roxana Capu, Ryan Thompson, C. Willem Rischau, Marli R. Cantarino, Premysl Marsik, Sergey L. Bud'ko, Neven Biškup, María Varela, Yurii G. Pashkevich, Serhii M. Orel, Thomas Prokscha, Andreas Suter, Jiangtao Zhao, Ugwumsinachi Oji, Marco Bonura, Peter Bencok, Zaher Salman, Stefano Gariglio, Christian Bernhard, Subhrangsu Sarkar   +19 more
wiley   +1 more source

Spin-transfer-torque resonant switching and injection locking in presence of a weak external microwave field for spin valves with perpendicular materials

, 2010
The effects of a weak microwave field in the magnetization dynamics driven by spin-transfer-torque in spin-valves with perpendicular materials have been systematically studied by means of full micromagnetic simulations.
Azzerboni, Bruno, Carpentieri, Mario, Finocchio, Giovanni, Torres, Luis   +3 more
core   +1 more source