Results 221 to 230 of about 48,645 (298)

Modeling ultrafast laser excitation of fused silica with a hybrid Lorentz-Drude dielectric response and density-dependent two-temperature model. [PDF]

Sci Rep
Metzner D, Rebentrost P, Pfeiffer M, Lickschat P, Opitz J, Weißmantel S.   +5 more
europepmc   +1 more source

Intensity Noise Dynamics in Terahertz Quantum Cascade Lasers

Laser &Photonics Reviews, EarlyView.
Intensity‐noise dynamics in terahertz quantum cascade lasers are investigated across single‐mode, dense‐comb and harmonic‐comb regimes using graphene thermoelectric detectors. Harmonic combs show ∼10% lower relative intensity noise, while RIN scales as P0−γ$P_0^{ - \gamma }$ with γ≈1.2$\gamma \approx 1.2$, revealing a crossover from spontaneous ...
M. Alejandro Justo‐Guerrero, Leonardo Viti, Vladimir Pushkarev, Lianhe Li, Edmund H. Linfield, Miriam S. Vitiello   +5 more
wiley   +1 more source

Efficacy of nano-sized ultrafine water clusters in reducing erythema following fractionated picosecond alexandrite laser treatment: a split-face, randomized, evaluator-blinded pilot study. [PDF]

Lasers Med Sci
Oku K.
europepmc   +1 more source

Transient Laser‐Induced Periodic Surface Structures Revealed by Time‐Resolved EUV Diffuse Scattering

Laser &Photonics Reviews, EarlyView.
The study shows that femtosecond laser pulses generate transient, LIPSS‐like surface patterns at fluences far below the damage threshold. Time‐resolved extreme ultraviolet scattering captures reciprocal space features that form within a few picoseconds and vanish on sub‐nanosecond timescales.
Dmitriy Ksenzov, Flavio Capotondi, Alexei A. Maznev, Filippo Bencivenga, Dieter Engel, Daniele Fausti, Laura Foglia, Raphael Gruber, Nicolas Jaouen, Mathias Kläui, Ivaylo Nikolov, Matteo Pancaldi, Emanuele Pedersoli, Bastian Pfau, Christian Gutt   +14 more
wiley   +1 more source

Photoactivation of [FeFe] Hydrogenase Studied by Multiscale Time-Resolved Infrared Spectroscopy. [PDF]

J Phys Chem Lett
Kobeleva E, Khalil M, Lachmann MT, Malakar P, Bhattacharya S, Greetham GM, Rodriguez-Maciá P, Birrell JA, Horch M.   +8 more
europepmc   +1 more source

Triggering of Koebner Phenomenon by Picosecond Laser in a Psoriatic Patient: Clinical and Immunopathologic Insights

Lasers in Surgery and Medicine, EarlyView.
ABSTRACT Objectives To report the first case of Koebner phenomenon induced by picosecond laser treatment in a patient with psoriasis. We analyzed the clinical and histopathological features and discussed the possible mechanism by which the laser's photomechanical effect triggered the reaction.
Teppei Sakai, Koya Sonoda, Jun Omatsu
wiley   +1 more source

Laser-Based Management of Occupational Photodamage in a Young Adult: A Case Report. [PDF]

Cureus
Velázquez Arenas LL, Garay Enriquez S, Gómez Guerra D.   +2 more
europepmc   +1 more source

Efficacy and Safety of Small‐Spot 755 nm Picosecond Laser‐Induced Optical Breakdown for Novel Photomechanical Skin Ablation in Asian Patients

Lasers in Surgery and Medicine, EarlyView.
ABSTRACT Objectives Conventional ablative and photothermal lasers are commonly used to treat superficial pigmentary lesions but often induce thermal injury and post‐inflammatory hyperpigmentation (PIH), particularly in Asian skin. Picosecond 755‐nm alexandrite lasers with diffractive lens arrays (DLA) create laser‐induced optical breakdown (LIOB ...
Nai‐Wen Chai, Wan‐Chun Liao, Chang‐Cheng Chang, Po‐Hsuan Wei, Yung‑Hsueh Huang, Ying‐Chuan Hsu, Yen‑Jen Wang, Yu‐Tsung Chen   +7 more
wiley   +1 more source