Results 201 to 210 of about 1,799,704 (293)

Dual‐Comb Spectroscopy With Fully Controlled Repetition Rate and Offset Frequency of Quantum Cascade Laser Frequency Combs

open access: yesLaser &Photonics Reviews, EarlyView.
Independent control of the repetition rate and offset frequency is demonstrated in quantum cascade laser frequency combs using radio‐frequency injection and thermal tuning. A revised comb model anchored at optical frequencies captures the unique behavior under radio‐frequency injection and enables precise frequency control.
Jie Liu   +5 more
wiley   +1 more source

Time‐Modulated Optomechanics Reveal Energy Flow and Inelastic Interactions Between Acoustic Phonons in Nanomembranes

open access: yesLaser &Photonics Reviews, EarlyView.
Temporal interfaces are abrupt refractive index changes used in time‐varying optics, but also transitions to nonequilibrium states. This work explores the inelastic scattering of time‐varying light by nonthermal acoustic phonons in the vicinity of temporal interfaces.
Anuj Kumar Dhiman   +10 more
wiley   +1 more source

A Versatile Illumination System for Real-Time Terahertz Imaging. [PDF]

open access: yesSensors (Basel), 2020
Perraud JB   +5 more
europepmc   +1 more source

PARCE: Accurate Inference of Crystal Structure Information From Phonon Vibrational Modes

open access: yesMaterials Genome Engineering Advances, EarlyView.
In this work, we introduce a multidescriptor framework and accuracy‐adaptive ensemble network to classify over 30,000 crystals from phonon and Raman data, achieving > 60% accuracy across diverse structures. Our work reduces reliance on ideal XRD data, enabling automated and large‐scale material structure analysis.
Hongyu Chen   +10 more
wiley   +1 more source

Light‐Driven Phase Engineering in 2D Materials From Mechanistic Assignment to Ambient Near‐Field Control

open access: yesSmall, EarlyView.
Light‐driven phase engineering in 2D materials centers on identifying what initiates conversion and what stabilizes the resulting phase. A practical workflow combines material verification, controlled driver tests, temporal measurements, and retention analysis.
Gour Mohan Das, Mika Pettersson
wiley   +1 more source

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