Results 91 to 100 of about 728 (215)
Controlling the Center of Mass Motion of Levitated Particles Using Structured Wavefronts
Laser &Photonics Reviews, EarlyView.Optically levitated particles have great potential for quantum‐enhanced sensing. Precise control of the trapping beam is crucial to improve the stability and confinement of these systems. Here, we study how structured wavefronts can be used to control the center‐of‐mass motion of levitated particles, enhancing trap stiffness and enabling stable ...
Shah Jee Rahman +7 more
wiley +1 more source
Treatment of visual problems after intracorneal ring implantation
Clinical Ophthalmology, 2013 Aydin Yildirim,1 Hasim Uslu,1 Necip Kara,2 Engin Bilge Ozgurhan21Fatih University, Department of Ophthalmology, Sema Research and Treatment Hospital, Istanbul, Turkey; 2Beyoglu Eye Research and Training Hospital, Istanbul, TurkeyPurpose: To report the ...
Yildirim A, Uslu H, Kara N, Ozgurhan EB
doaj
PhotonicsAtmospheric turbulence introduces distortions to the wavefront of propagating optical radiation. It causes image resolution degradation in astronomical telescopes and significantly reduces the power density of radiation on the target in focusing ...
Ilya Galaktionov, Vladimir Toporovsky
doaj +1 more source
Interleaved Diffractive Networks for Information Transfer Through Random Diffusers
Laser &Photonics Reviews, EarlyView.This work presents a cascaded diffractive optical network that enables information transfer through random, unknown diffusers using passive, interleaved structured layers that mitigate scattering without digital computation. A hybrid optical‐digital version further improves robustness and reconstruction fidelity under distortions, with both simulations
Yuhang Li +4 more
wiley +1 more source
Laser &Photonics Reviews, EarlyView.A monochrome multi‐task diffractive optical network architecture is designed to leverage illumination‐phase multiplexing to dynamically reconfigure its output function and accurately implement a large set of complex‐valued linear transformations between an input and an output aperture.
Xiao Wang, Aydogan Ozcan
wiley +1 more source
Diffraction‐Free Natural Optical Skyrmions and Their Subwavelength Confinement Around Vortices
Laser &Photonics Reviews, EarlyView.ABSTRACT Diffraction causes waves to spread out as they propagate freely. The tighter the lateral confinement, the faster the spreading. Past research on how to suppress diffraction has been based on wave engineering and has led so far to idealized waves that, in real settings, eventually diffract.
Nilo Mata‐Cervera +4 more
wiley +1 more source
HoloSpec: Dispersion‐Based 4D Computational Holographic Hyperspectral Imaging
Laser &Photonics Reviews, EarlyView.HoloSpec, a compact dispersion‐based computational holographic system, achieves four‐dimensional imaging by retrieving 3D spatial structure and high‐resolution spectra from only two monochromatic snapshots. Using a single prism and a monochrome sensor, it resolves 430 spectral channels with 3 nm experimental resolution and 30 μm$\mathrm{\mu}\mathrm{m}$
Jingyan Chen +3 more
wiley +1 more source
A Nearly Perfect Implementation of a Broadband Optical Null Media via Space‐Folding
Laser &Photonics Reviews, EarlyView.A space‐folding optical null medium with impedance‐matching layers enables broadband directional wave projection and wavefront engineering. By tailoring the folding ratio and dilution ratio, the structure maintains near‐unity transmittance over 5–9 GHz.
Yichao Liu, Jiale Li, Fei Sun, Qin Liao
wiley +1 more source
Wavefront sensorless adaptive optics for large aberrations
Optics Letters, 2006 In some adaptive optics systems the aberration is determined not by using a wavefront sensor but by sequential optimization of the adaptive correction element. Efficient schemes for the control of such systems are essential if they are to be effective.
openaire +3 more sources
Generating Helical Polymorphic Beams Using Dielectric Metasurfaces
Laser &Photonics Reviews, EarlyView.Helix‐shaped polymorphic beams are optical fields whose intensity maxima spiral around the propagation axis, enabling particle manipulation through attractive or repulsive forces. Traditionally requiring expensive spatial light modulators, metasurfaces now provide a compact, cost‐effective alternative. This work demonstrates general helical polymorphic
Maryam Setareh +3 more
wiley +1 more source