Results 21 to 30 of about 528 (244)

Milliwatt-Level Spontaneous Emission Across the 3.5–8 µm Spectral Region from Pr3+ Doped Selenide Chalcogenide Fiber Pumped with a Laser Diode

open access: yesApplied Sciences, 2020
A spontaneous emission fiber source operating in the mid-infrared (MIR) wavelength range from 3.5 to 8 µm is demonstrated for the first time at output power levels of at least 1 mW.
Lukasz Sojka   +9 more
doaj   +1 more source

Deep Learning for Photonic Design and Analysis: Principles and Applications

open access: yesFrontiers in Materials, 2022
Innovative techniques play important roles in photonic structure design and complex optical data analysis. As a branch of machine learning, deep learning can automatically reveal the inherent connections behind the data by using hierarchically structured
Bing Duan   +5 more
doaj   +1 more source

Photon–graviton mixing in an electromagnetic field [PDF]

open access: yesJournal of Physics A: Mathematical and Theoretical, 2008
13 pages, 1 figure, talk given by C. Schubert at QFEXT07, Leipzig, 17-21 Sep 2007, final published version (slightly extended)
BASTIANELLI, FIORENZO   +3 more
openaire   +3 more sources

Large Horizontal Near-Field Scanner Based on a Non-Tethered Unmanned Aerial Vehicle

open access: yesIEEE Open Journal of Antennas and Propagation, 2022
A horizontal planar scanner with an approximate size of 40 m $\times40$ m has been implemented using the Unmanned Aerial Vehicle (UAV) technology. The UAV is not wired to the ground to maintain the flexibility and short setup time of a non-tethered ...
Lorenzo Ciorba   +13 more
doaj   +1 more source

On the creation of a photon by an electromagnetic wave ball

open access: yesScientific Reports, 2023
Abstract Recent literature has shown, theoretically as well as experimentally, that while a beam splitter does not split a single photon, it nonetheless divides the electromagnetic wave into transmitted and reflected, with both containing energies. This implies the existence of a spacetime of pure electromagnetic waves of energies but
openaire   +3 more sources

Electromagnetic forces in photonic crystals [PDF]

open access: yesPhysical Review B, 1999
11 pages RevTex, 14 ...
Antonoyiannakis, M. I., Pendry, J. B.
openaire   +2 more sources

Experimental Investigation of Actively Q-Switched Er3+:ZBLAN Fiber Laser Operating at around 2.8 µm

open access: yesSensors, 2020
A diode-pumped Q-switched Er3+:ZBLAN double-clad, single-transverse mode fiber laser is practically realized. The Q-switched laser characteristics as a function of pump power, repetition rate, and fiber length are experimentally investigated. The results
Lukasz Sojka   +6 more
doaj   +1 more source

Features of excited fields in a cavity resonator filled with a near-zero refractive index medium

open access: yesВісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електроніка, 2023
Background. Modern artificial media are capable of providing specially pointed electromagnetic parameters, such as a negative refractive index, or a near-zero refractive index.
M. S. Antyufeyeva   +2 more
doaj   +1 more source

(INVITED) Methods for determining the refractive indices and thermo-optic coefficients of chalcogenide glasses at MIR wavelengths

open access: yesOptical Materials: X, 2019
Chalcogenide glasses have attracted much attention for the realization of photonic components owing to their outstanding optical properties in the mid-infrared (MIR) region. However, relatively few refractive index dispersion data are presently available
Y. Fang   +9 more
doaj   +1 more source

Programmable VO2 metasurface for terahertz wave beam steering

open access: yesiScience, 2022
Summary: Programmable vanadium dioxide (VO2) metasurface is proposed at THz frequencies. The insulating and metallic states of VO2 can be switched via external electrical stimulation, resulting in the dynamical modulation of electromagnetic response. The
Daquan Yang   +6 more
doaj   +1 more source

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