Results 261 to 270 of about 149,288 (320)

Micro‐Transfer Printed Continuous‐Wave and Mode‐Locked Laser Integration at 800 nm on a Silicon Nitride Platform

open access: yesLaser &Photonics Reviews, EarlyView.
A heterogeneous III‐V/SiN platform for lasers at 800 nm is realized using the micro‐transfer printing method. Efficient GaAs gain sections are directly butt‐coupled to SiN waveguides, enabling continuous‐wave and mode‐locked extended‐cavity lasers. The mode‐locked lasers generate highly stable pulse trains with repetition rates up to 9.2 GHz and a ...
Max Kiewiet   +13 more
wiley   +1 more source

In Situ Optical Monitoring and Morphological Evolution of Si Nanowires Grown on Faceted Al<sub>2</sub>O<sub>3</sub>(0001) Substrates. [PDF]

open access: yesNanomaterials (Basel)
Toktarbaiuly O   +6 more
europepmc   +1 more source

Reconfigurable Circularly Polarized Terahertz Emission from vdW Ferroelectric NbOI2

open access: yesLaser &Photonics Reviews, EarlyView.
A controllable chiral terahertz pulse can be generated using a simple dual‐flake vdW ferroelectric NbOI2 emitter in which the polar axes of the two NbOI2 flakes are orthogonal. Both the chirality and the ellipticity can be manipulated by varying the separation distance and the orientations of their polar axes.
Baolong Zhang   +3 more
wiley   +1 more source

Bandgap Engineering of Ga2O3 by MOCVD Through Alloying with Indium. [PDF]

open access: yesNanomaterials (Basel)
Islam MM   +5 more
europepmc   +1 more source

Prospective Evaluation of a Fractional 675‐nm Nonablative Laser for Atrophic Acne Scars in Fitzpatrick Skin Types III–IV

open access: yesLasers in Surgery and Medicine, EarlyView.
ABSTRACT Background Energy‐based treatments for atrophic acne scars (AAS) in darker skin phototypes must balance efficacy with pigmentary safety. While the nonablative 675‐nm laser has shown promise with minimal risk of adverse effects, prospective data in Asian populations remain limited.
Pinthisa Nisagornsen   +6 more
wiley   +1 more source

Temperature‐Dependent Chain Structures during Solution‐Grown Crystallization via Atomic Force Microscopy

open access: yesMacromolecular Rapid Communications, EarlyView.
AFM‐based single‐molecule force spectroscopy was employed to investigate temperature‐dependent single‐chain folding structures of semi‐crystalline PEO. Force–volume measurements enabled correlation of force–extension behavior with local crystal morphology. Results reveal temperature‐dependent aggregation structures, with intermediate structures favored
Dingrui Wang   +2 more
wiley   +1 more source

Orthogonal Staggered Alignment of Molecular Chains in Aramid Whiskers: A Game‐Changer for Sustainable, High‐Performance Composites

open access: yesMacromolecular Rapid Communications, EarlyView.
Poly(p‐benzamide) whiskers with orthogonal chain alignment form prismatic single crystals, enabling uniform dispersion and high crystallinity. This architecture enhances composite thermal stability, modulus, and dimensional integrity, offering a sustainable, lightweight alternative to inorganic fillers and redefining polymer crystallography through ...
Satoshi Okamoto   +5 more
wiley   +1 more source

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