Results 21 to 30 of about 3,379 (252)

Active nonlocal metasurfaces

open access: yesNanophotonics, 2020
Actively tunable and reconfigurable wavefront shaping by optical metasurfaces poses a significant technical challenge often requiring unconventional materials engineering and nanofabrication.
Malek Stephanie C.   +3 more
doaj   +1 more source

Nonlinear wavefront shaping with optically induced three-dimensional nonlinear photonic crystals

open access: yesNature Communications, 2019
Generation of light with desirable amplitude and phase profiles with nonlinear wavefront shaping is important for optical technologies. Here, the authors demonstrate nonlinear wavefront shaping with three-dimensional nonlinear photonic crystals formed by
Shan Liu   +7 more
doaj   +1 more source

Wavefront shaping through emulated curved space in waveguide settings

open access: yesNature Communications, 2016
Wavefront shaping is typically carried out outside the medium within which the beam is propagating. Sheng et al.exploit concepts inspired by General Relativity for wavefront shaping within optical waveguide settings, constructing narrow collimated beams ...
Chong Sheng   +4 more
doaj   +1 more source

Artificial intelligence-assisted light control and computational imaging through scattering media [PDF]

open access: yesJournal of Innovative Optical Health Sciences, 2019
Coherent optical control within or through scattering media via wavefront shaping has seen broad applications since its invention around 2007. Wavefront shaping is aimed at overcoming the strong scattering, featured by random interference, namely speckle
Shengfu Cheng   +4 more
doaj   +1 more source

Mesoscopic theory of optical wavefront shaping to focus deep inside opaque media [PDF]

open access: yesEPJ Web of Conferences
We describe the theory of optical wavefront shaping, where waves are focused to a predefined focal point deep inside a disordered three-dimensional (3D) opaque medium (e.g., tissue, paint, foam) by shaping the wavefield sent by N external array elements.
van Tiggelen Bart A.   +2 more
doaj   +1 more source

Optical Cryptanalysis Method Using Wavefront Shaping

open access: yesIEEE Photonics Journal, 2017
Optical techniques for information security have drawn a lot of attention in recent years. The development of cryptanalysis strategies will also have a positive promotion for the cryptosystems themselves.
Meihua Liao   +3 more
doaj   +1 more source

High quality factor metasurfaces for two-dimensional wavefront manipulation

open access: yesNature Communications, 2023
The strong interaction of light with micro- and nanostructures plays a critical role in optical sensing, nonlinear optics, active optical devices, and quantum optics.
Claudio U. Hail   +4 more
doaj   +1 more source

Improving Depth Sensitive Fluorescence Spectroscopy With Wavefront Shaping by Spectral and Spatial Filtering

open access: yesIEEE Access, 2019
Depth sensitive optical spectroscopy preferentially detects optical spectra from different depths in layered samples, which plays a crucial role in many applications such as the optical diagnosis of epithelial precancer and cancer.
Chao-Mao Hsieh, Manish Verma, Quan Liu
doaj   +1 more source

Isotropically resolved label-free tomographic imaging based on tomographic moulds for optical trapping

open access: yesLight: Science & Applications, 2021
A general method for the in-situ isotropic microtomography of freestanding specimens, exploiting complex wavefront shaping and optical tweezers.
Moosung Lee   +3 more
doaj   +1 more source

Efficient Switchable Common Path Interferometer for Transmission Matrix Characterization of Scattering Medium

open access: yesIEEE Photonics Journal, 2022
Transmission matrix can be used as an elegant tool to represent the light transmission characteristics of a scattering medium. In this paper, we propose a novel common path interferometer technique to measure the transmission matrix utilizing the ...
Han Gao   +4 more
doaj   +1 more source

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