Results 21 to 30 of about 1,013,031 (328)

Review of advanced imaging techniques

open access: yesJournal of Pathology Informatics, 2012
Pathology informatics encompasses digital imaging and related applications. Several specialized microscopy techniques have emerged which permit the acquisition of digital images ("optical biopsies") at high resolution.
Yu Chen   +5 more
doaj   +1 more source

Deep learning in light–matter interactions

open access: yesNanophotonics, 2022
The deep-learning revolution is providing enticing new opportunities to manipulate and harness light at all scales. By building models of light–matter interactions from large experimental or simulated datasets, deep learning has already improved the ...
Midtvedt Daniel   +5 more
doaj   +1 more source

Transformation Optics and the Geometry of Light [PDF]

open access: yes, 2008
Metamaterials are beginning to transform optics and microwave technology thanks to their versatile properties that, in many cases, can be tailored according to practical needs and desires.
Leonhardt, Ulf, Philbin, Thomas G.
core   +2 more sources

Optical near-fields & nearfield optics

open access: yesBeilstein Journal of Nanotechnology, 2014
Optical methods provide exceedingly powerful tools in science and technology for measuring, analyzing and manipulating, from optical microscopy and spectroscopy to the characterization of ultrafast processes by femtosecond pulses and the modification of materials by intense laser radiation. However, when it comes to applications in the nanometer-regime,
Meixner, Alfred J., Leiderer, Paul
openaire   +4 more sources

A Review of Compressive Sensing in Information Security Field

open access: yesIEEE Access, 2016
The applications of compressive sensing (CS) in the field of information security have captured a great deal of researchers' attention in the past decade. To supply guidance for researchers from a comprehensive perspective, this paper, for the first time,
Yushu Zhang   +5 more
doaj   +1 more source

Atmospheric tomography with separate minimum variance laser and natural guide star mode control [PDF]

open access: yes, 2009
This paper introduces a novel, computationally efficient, and practical atmospheric tomography wavefront control architecture with separate minimum variance laser and natural guide star mode estimation.
Ellerbroek, B. L., Gilles, L.
core   +1 more source

Silicon-on-Nitride Waveguide With Ultralow Dispersion Over an Octave-Spanning Mid-Infrared Wavelength Range

open access: yesIEEE Photonics Journal, 2012
The proposed silicon-on-nitride (SON) waveguide exhibits an ultrabroadband (4200 nm), low chromatic dispersion in the mid-infrared (MIR) wavelength region from 2430 to 6630 nm. It has two zero-dispersion wavelengths within the span.
Yang Yue   +4 more
doaj   +1 more source

Low-Power All-Optical Switch Based on Time-Reversed Microring Laser

open access: yesIEEE Photonics Journal, 2012
An all-optical switch based on an absorbing microring resonator laterally coupled to two waveguides is described theoretically using the coupling of modes in time formalism and numerically using the finite-difference time-domain method.
Adam Mock
doaj   +1 more source

Time-reversed wave mixing in nonlinear optics [PDF]

open access: yes, 2013
Time-reversal symmetry is important to optics. In linear optics, a time-reversed process to laser emission enables total absorption of coherent light fields into an optical cavity of loss by time-reversing the original gain medium.
Chen, Xianfeng   +3 more
core   +2 more sources

A new perturbative expansion of the time evolution operator associated with a quantum system

open access: yes, 2005
A novel expansion of the evolution operator associated with a -- in general, time-dependent -- perturbed quantum Hamiltonian is presented. It is shown that it has a wide range of possible realizations that can be fitted according to computational ...
Agarwal G S   +28 more
core   +1 more source

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