Results 71 to 80 of about 7,511 (256)

Giant Nonequilibrium Valley Control via Spin‐Selective Hot‐Carrier Transfer in an Antiferromagnetic van der Waals Stack

Advanced Materials, EarlyView.
Spin‐selective hot‐carrier transfer across CrSBr/WSe2/CrSBr interfaces couples the continuously tunable magnetic configuration of antiferromagnetic CrSBr to the valley degrees of freedom of monolayer WSe2, enabling giant nonequilibrium valley control and magnetic‐state‐dependent reversal of circularly polarized emission.
Ke Xiao, Jiabao Yang, Kai Feng, Yicheng Guan, James Caleb Peters, Ramona Hoffmann, Niels Schröter, Stuart S. P. Parkin   +7 more
wiley   +1 more source

Recent developments and advances in artificial saturable absorber for mode-locking in fiber lasers

Results in Engineering
In this work, we review recent work developments in artificial saturable absorbers (SAs) for ultrafast fiber lasers. The working principles of each technique, namely nonlinear polarization rotation (NPR), nonlinear optical loop mirror (NOLM) and ...
Yu Chen, Sin Jin Tan, Sulaiman Wadi Harun, G. Vinitha, Truong Khang Nguyen, Zian Cheak Tiu   +5 more
doaj   +1 more source

Precision Layered Stealth Dicing of SiC Wafers by Ultrafast Lasers. [PDF]

Micromachines (Basel), 2022
Yang B, Wang H, Peng S, Cao Q.
europepmc   +1 more source

Parity‐Dependent THz Harmonic Generation in Electrically Pumped Micro‐Lasers Exploiting Topological Insulator–Metamaterial Gratings

Advanced Materials, EarlyView.
Topological insulator–metamaterials integrated with electrically driven terahertz quantum cascade lasers enable parity‐dependent harmonic generation. Bulk‐dominated Bi2Se3 favors third‐harmonic emission at 9.96 THz, whereas topological‐surface‐state‐dominated Bi2Se3, Bi2Te3, and (Bi,Sb)2Te3 generate strong second harmonics near 6.5 THz.
Alessandra Di Gaspare, Craig S. Knox, Ahmet Yagmur, Sara Ghayeb Zamharir, Lianhe Li, Satoshi Sasaki, A. Giles Davies, Edmund H. Linfield, Joshua R. Freeman, Miriam S. Vitiello   +9 more
wiley   +1 more source

Research Progress of Passively Mode-Locked Fiber Lasers Based on Saturable Absorbers

Nanomaterials
Ultrashort fiber lasers are one of the current research hotspots in the field of lasers. They have the advantages of compact structure and high beam quality.
Jiayi Xie, Tengfei Liu, Xilong Liu, Fang Wang, Weiwei Liu   +4 more
doaj   +1 more source

Ultrafast Electrically Pumped VECSELs

IEEE Photonics Journal, 2013
We present an improved design for electrically pumped vertical external-cavity surface-emitting lasers (EP-VECSELs) optimized for passive modelocking with a semiconductor saturable absorber mirror (SESAM).
W. P. Pallmann, C. A. Zaugg, M. Mangold, I. Dahhan, M. Golling, B. W. Tilma, B. Witzigmann, U. Keller   +7 more
doaj   +1 more source

Superionic states formation in group III oxides irradiated with ultrafast lasers. [PDF]

Sci Rep, 2022
Voronkov RA, Medvedev N, Volkov AE.
europepmc   +1 more source

Giant Anisotropic Spin Absorption in Chiral Hybrid Semiconductors

Advanced Materials, EarlyView.
Researchers uncover that chiral hybrid organic–inorganic semiconductors absorb spin differently depending on its polarization direction. This anisotropic spin absorption is primarily driven by the local symmetry breaking within the layered structure.
Cong Yang, Rui Sun, Mingwei Ge, Shehzad Khan, Subhrangsu Mukherjee, Matthew P. Hautzinger, Tianyou Lu, Harald Ade, Pius M. Theiler, Matthew C. Beard, Dali Sun, Mengxia Liu, Jun Liu   +12 more
wiley   +1 more source

Recent Developments of Quantum Dot Materials for High Speed and Ultrafast Lasers. [PDF]

Nanomaterials (Basel), 2022
Yao Z, Jiang C, Wang X, Chen H, Wang H, Qin L, Zhang Z.   +6 more
europepmc   +1 more source

Industrial Ultrafast Lasers

Advanced Photonics, 2014
From advanced scientific tools to industrial equipment used in numerous factories worldwide, ultrafast lasers have come a long way during the last decade. We will review the current status of ultrafast technologies, present selected industrial case studies and outline future key developments.
openaire   +2 more sources