Results 131 to 140 of about 919,980 (236)
Wavefront Shaping for Optimal Extinction of Focused Light by Individual Nanoscatterers
Laser &Photonics Reviews, EarlyView.Wavefront shaping enables near‐complete optical extinction by nanoscatterers separated from a planar reflector. Time‐reversed emission profiles provide optimal illumination conditions, yielding 70% extinction from a single plasmonic nanoparticle and up to 90% from sub‐wavelength nanoparticle clusters, offering a promising route to efficient in‐ and out‐
Nick Feldman +5 more
wiley +1 more source
Microlens Array-Based Beam Profile and Wavefront Sensor With Physical Constraint Learning
IEEE Photonics JournalThe beam profile and wavefront characteristics of laser beams are essential for numerous laser applications, including micromachining and microfabrication.
Feng-Chun Hsu +3 more
doaj +1 more source
Phase error correction in wavefront curvature sensing via phase retrieval
, 2008 Wavefront curvature sensing with phase error correction system is carried out using phase retrieval based on a partially-developed volume speckle field. Various wavefronts are reconstructed: planar, spherical, cylindrical, and a wavefront passing through
Percival F. Almoro +3 more
core +1 more source
Transmission‐Mode Silicon‐Rich Nitride Mie‐Void Metasurfaces in the Visible
Laser &Photonics Reviews, EarlyView.Transmission‐mode Mie‐void metasurfaces are demonstrated in silicon‐rich nitride, where localized void resonances hybridize with slab‐guided and Fabry–Pérot‐like modes in a finite film, producing a quantified avoided crossing between coupled modes. Controlled void depth tunes the visible transmission spectrum, enabling structural color and spatial ...
Oren Goldberg, Noa Mazurski, Uriel Levy
wiley +1 more source
Special Issue "EUV and X-ray Wavefront Sensing". [PDF]
Sensors (Basel), 2022 Idir M, Cocco D, Huang L.
europepmc +1 more source
Weak Measurement for Characterizing Effective Jones Matrices of Phase Gradient Metasurfaces
Laser &Photonics Reviews, EarlyView.Spin dependent deflection from a PB phase gradient metasurface is converted by two dimensional weak measurement into a centroid map, where the amplitude ratio, phase difference, and phase gradient produce distinct spatial features. These effective parameters are then retrieved directly from the centroid response.
Peng Tang +8 more
wiley +1 more source
Laser &Photonics Reviews, EarlyView.A polarization‐dependent liquid–crystal spatial light modulator is used to generate coaxial double‐focus laser beams with independently tunable focal separation and intensity. Applied to silicon, this configuration enables counterpropagating pulse interactions using a single focusing element, enhancing nonlinear excitation and achieving near‐critical ...
Niladri Ganguly +2 more
wiley +1 more source
Shack-Hartmann Wavefront Sensing of Ultrashort Optical Vortices. [PDF]
Sensors (Basel), 2021 Pandey AK +4 more
europepmc +1 more source
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT We present experimental results on the relationship between rain attenuation and simultaneous scintillation during rain events, based on beacon signal measurements at 19.7 (Ka‐band) and 39.4 GHz (Q‐band) from the geosynchronous Alphasat satellite (25° E), received at two Italian ground stations, Spino d'Adda (42.1° slant path) and Tito Scalo ...
Miles Turner +5 more
wiley +1 more source
Smart Molecules, EarlyView.Nonthermal ultrasound transforms acoustic energy into diverse therapeutic bioeffects through cavitation, mechanical stimulation, and physicochemical activation. This review discusses how acoustic parameters, biological mechanisms, and responsive materials interact to influence nonthermal ultrasound‐enabled cancer therapies. Mechanism‐guided engineering
Liu Wang +5 more
wiley +1 more source