Results 221 to 230 of about 137,687 (347)

Generation of Two‐Cycle Light Bullets With 2.0 mJ Energy via Self‐Compression of 5‐µm Pulses in Zinc Sulfide

open access: yesLaser &Photonics Reviews, EarlyView.
Simultaneous temporal soliton self‐compression with simultaneous formation of a radial Townes profile is reported for millijoule pulses at 4.9 µm wavelength in ZnS. Pulses as short as 37 fs are generated in a 1‐kHz pulse train. The compression regime appears below the onset of filamentation, yielding two‐cycle pulses with 2.0 mJ energy which translates
Martin Bock   +3 more
wiley   +1 more source

Wavelength‐Agnostic 3D‐Nanoprinted Coupler

open access: yesLaser &Photonics Reviews, EarlyView.
A dual‐ellipsoidal 3D‐nanoprinted photonic coupler enables quasi‐free‐space propagation for wavelength‐agnostic, ultra‐broadband photonic interfacing. Combining matrix‐optics pre‐design with full‐vectorial simulations, it delivers a record‐wide 1 dB bandwidth exceeding 800 nm with ≈1.3 dB insertion loss.
Huiyu Huang   +4 more
wiley   +1 more source

Femtosecond Laser‐Driven Fabrication of a Polymeric Lab‐on‐a‐Chip for Efficient Size‐Based Particle Sorting in a Spiral Microchannel

open access: yesMacromolecular Materials and Engineering, EarlyView.
Femtosecond laser 3D micromachining enables the fabrication of spiral microfluidic devices in polymethylmethacrylate with a trapezoidal cross‐section. The process relies on scanning speed as the main control parameter, ensuring high precision and scalability.
Stefania Caragnano   +7 more
wiley   +1 more source

Glass Microsphere‐Filled Microlayer Films via Layer Multiplying Co‐Extrusion: Morphology and Process Stability

open access: yesMacromolecular Materials and Engineering, EarlyView.
This study explores processing conditions during the co‐extrusion of highly particle‐filled layered polymeric composites. With an appropriate rheology match, layers with thicknesses approaching the particle sizes are possible. However, instability‐driven layer break‐up occurs when a critical interfacial shear stress is exceeded.
Dayne A. Plemmons   +4 more
wiley   +1 more source

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