Results 111 to 120 of about 4,173 (275)

High-resolution wavefront shaping with a photonic crystal fiber for multimode fiber imaging [PDF]

, 2016
We demonstrate that a high-numerical-aperture photonic crystal fiber allows lensless focusing at an unparalleled resolution by complex wavefront shaping.
Mosk, Allard P., Jiang, Xin, Amitonova, Lyubov, Frosz, M., Sub Nanophotonics, Frosz, M. H., Pinkse, Pepijn W.H., Russell, P., Petschulat, Joerg, Russell, P. S. J., Descloux, A., Nanophotonics, Babic, Fehim, Babic, F., Ahmed, Goran, Russell, Philip St. J., Descloux, Adrien, Mosk, A. P., Mosk, A., Pinkse, P., Amitonova, L., Amitonova, Lyubov V.; id_orcid, Amitonova, L. V., Russell, Philip St.J., Amitonova, Lyubov V., Petschulat, J., Pinkse, Pepijn W. H., Ahmed, G., Jiang, X., Pinkse, P.W.H., Pinkse, Pepijn Willemszoon Harry, Frosz, Michael H., Mosk, Allard   +32 more
core   +1 more source

Non‐Uniform Space‐Time‐Coding Modulation for Low‐Complexity Diagnostics of Reconfigurable Intelligent Surfaces

Advanced Electronic Materials, EarlyView.
A diagnostic method for reconfigurable intelligent surfaces (RIS) based on non‐uniform space‐time‐coding modulation is presented. Fault localization is achieved via amplitude‐only spectral measurements, eliminating the need for complex signal processing. A one‐to‐one mapping between harmonic components and RIS elements enables accurate detection.
Xiao Qing Chen, Lei Zhang, Yi Ning Zheng, Bing Bing Zhu, Marco Rossi, Giuseppe Castaldi, Shuo Liu, Vincenzo Galdi, Tie Jun Cui   +8 more
wiley   +1 more source

Coupling of energy into the fundamental diffusion mode of a complex nanophotonic medium

New Journal of Physics, 2016
We demonstrate experimentally that optical wavefront shaping increases light coupling into the fundamental diffusion mode of a scattering medium. The total energy density inside a scattering medium of zinc oxide nanoparticles was probed by exciting ...
Oluwafemi S Ojambati, Hasan Yılmaz, Ad Lagendijk, Allard P Mosk, Willem L Vos   +4 more
doaj   +1 more source

Conformal Reconfigurable Intelligent Surfaces: A Cylindrical Geometry Perspective

Advanced Electronic Materials, EarlyView.
Cylindrical reconfigurable intelligent surfaces are explored for low‐complexity beam steering using one‐bit meta‐atoms. A multi‐level modeling approach, including optimization‐based synthesis, demonstrates that even minimal hardware can support directive scattering.
Filippo Pepe, Ivan Iudice, Giuseppe Castaldi, Marco Di Renzo, Vincenzo Galdi   +4 more
wiley   +1 more source

Mesoscopic transport and control of light through disordered nanowire mats

, 2014
In this thesis the transport of light through disordered, densely packed semiconductor nanowire mats is studied. It is found that the extremely high photonic strength of these samples leads to corrections to the traditional diffusion picture of light ...
Strudley, Tom
core  

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

Advanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang, Weipeng Wang, Xuan Cong, Shiyu Wang, Gao Li, Sen Gong, Lin Huang, Hongxin Zeng, Yaxin Zhang, Ziqiang Yang   +9 more
wiley   +1 more source

Time reversed optical waves by arbitrary vector spatiotemporal field generation

Nature Communications, 2020
Truly arbitrary spatiotemporal wavefront shaping has many potential applications in optics. Here the authors develop a system capable of arbitrary waveshaping to the extent of full time reversal of spatiotemporal optical beams.
Mickael Mounaix, Nicolas K. Fontaine, David T. Neilson, Roland Ryf, Haoshuo Chen, Juan Carlos Alvarado-Zacarias, Joel Carpenter   +6 more
doaj   +1 more source

Wavefront shaping for ultrashort pulse delivery through optical fibers for imaging and ablation

We demonstrate high power ultrashort pulse delivery through a commercially available multicore fiber (MCF) and a multimode graded-index fiber (GRINF) for imaging and laser ablation.
Moser, Christophe, Psaltis, Demetri, Loterie, Damien, Stasio, Nicolino, Kakkava, Eirini, Conkey, Donald B.   +5 more
core   +1 more source

Recent Advances in Programmable Metasurfaces and Meta‐Devices

Advanced Electronic Materials, EarlyView.
Programmable metasurfaces enable various novel functionalities by dynamically tuning electromagnetic wavefronts. This article provides a comprehensive review of recent advances in microwave and terahertz programmable metasurfaces, covering electrical, thermal, optical, and mechanical control mechanisms.
Linda Shao, Chong He, Nan Wang, Liming Si, Weiren Zhu   +4 more
wiley   +1 more source

A practical guide to digital micro-mirror devices (DMDs) for wavefront shaping

JPhys Photonics
Digital micromirror devices have gained popularity in wavefront shaping, offering a high frame rate alternative to liquid crystal spatial light modulators.
Sébastien M Popoff, Louis Malosse, Rodrigo Gutiérrez-Cuevas, Yaron Bromberg, Jean Commère, Marie Glanc, Raphaël Galicher, Maxime W Matthès   +7 more
doaj   +1 more source