Results 91 to 100 of about 140,562 (225)
Nanophotonics, 2020 Designing and engineering microresonator dispersion are essential for generating microresonator frequency comb. Microresonator frequency combs (microcombs, Kerr frequency combs) offer the potential for various attractive applications as a new type of ...
Fujii Shun, Tanabe Takasumi
doaj +1 more source
Laser &Photonics Reviews, Volume 19, Issue 10, May 22, 2025.The reabsorption of photons between small (5 nm) and large (50 nm) MAPbBr₃ nanocrystals (NCs) generates amplified spontaneous emission and random lasing under reduced thresholds (Pth≈1 µJ cm−2) and high‐quality factors (Q ≈10⁴). The device consists of a waveguide structure where the NCs are grown in‐situ within a Ni(AcO)2 matrix.
Sandra Soriano‐Díaz +5 more
wiley +1 more source
Microring quantum cascade surface emitting lasers
APL PhotonicsWe miniaturize a vertically coupled in-plane whispering gallery mode cavity incorporating a quantum cascade gain medium, aiming to realize the mid-infrared counterpart to the vertical cavity surface emitting laser.
David Stark +2 more
doaj +1 more source
WGM-Based Sensing of Characterized Glucose- Aqueous Solutions at mm-Waves
IEEE Access, 2020 A newly-developed commercial coaxial probe kit (DAK-TL) is used to characterize the electromagnetic properties of glucose-loaded samples prepared at a range of concentrations 0.7-1.2 mg/ml similar to Type-2 normal diabetics in a broad range of ...
Ala Eldin Omer +3 more
doaj +1 more source
Parametric Instabilities in Shallow Water Magnetohydrodynamics Of Astrophysical Plasma in External Magnetic Field [PDF]
arXiv, 2015 This letter discusses rotating magnetohydrodynamics (MHD) of a thin layer of astrophysical plasma. To describe a thin plasma layer with a free surface in a vertical external magnetic field we use the shallow water ap- proximation. The presence of a vertical magnetic field essentially changed the wave processes dynamics in astrophysical plasma compared ...
arxiv
Two-wave interaction in ideal magnetohydrodynamics [PDF]
, 2006 The weakly nonlinear interaction of sound and linearly polarised Alfv{\'e}n waves propagating in the same direction along an applied magnetic field is studied. It is found that a sound wave is coupled to the Alfv{\'e}n wave with double period and wavelength when the sound and Alfv{\'e}n speeds are equal.
arxiv +1 more source
Coherent Phase Control of Ultrashort Electron Pulses by Traveling Optical Waves and Whispering-gallery Modes [PDF]
, 2020 Armin Feist +7 more
openalex +1 more source
Millimeter Wave All-Around Antenna Based on Whispering Gallery Mode Dielectric Resonator for IoT-Based Applications [PDF]
, 2022 A. E. Kogut +6 more
openalex +1 more source
Absorption effects in lasing microdroplets of dye solutions
Responsive Materials, Volume 3, Issue 2, May 2025.A fine balance between optical gain and absorption losses regulates light amplification by stimulated emission of radiation (LASER) in microspherical droplets of fluorescent dye solutions. As a result, stimuli‐induced changes in the absorption coefficients of the molecular dopants, entrapped in the lasing microdroplets, alter drastically the spectral ...
William M. Piedra +3 more
wiley +1 more source
The Origin of Ripples in Cool Cores of Galaxy Clusters: Heating by MHD Waves? [PDF]
, 2007 We consider MHD waves as a heating source of cool cores of galaxy clusters. In particular, we focus on transverse waves (Alfven waves), because they can propagate a longer distance than longitudinal waves (sound waves). Using MHD simulations, we found that the transverse waves can stably heat a cool core if the wave period is large enough (>~ 10^8 yr).
arxiv +1 more source