Results 21 to 30 of about 15,894 (239)

Investigation and Analysis of Acoustojets by Spectral Element Method

open access: yesMathematics, 2022
In this study, acoustic wave scattering in a homogeneous media by an obstacle is examined in the case of plane wave excitation and the formation of acoustic jets is explored.
Ibrahim Mahariq   +5 more
doaj   +1 more source

POSSIBILITY FOR FREQUENCY STABILIZATION OF MILLIMETER WAVELENGTH SOLID-STATE SOURCE BY A SCREENED DIELECTRIC RESONATOR [PDF]

open access: yesRadio Physics and Radio Astronomy, 2016
Purpose: Showing the possibility in principle of the use of a screened dielectric resonator excited by the planar waveguide to stabilize the frequency of solid-state sources in the millimeter wavelength range.
A. E. Kogut   +4 more
doaj   +1 more source

Numerical simulation of multi-color laser generation in Tm-doped tellurite microsphere at 1.9, 1.5 and 2.3 microns

open access: yesResults in Physics, 2020
We present the first detailed theoretical analysis of multi-color continuous wave lasing in Tm-doped tellurite spherical microresonators with whispering gallery modes pumped at a wavelength of 792 nm.
E.A. Anashkina   +2 more
doaj   +1 more source

A resonance system of an optoelectronic oscillator based on a transmission-type planar optical disk microcavity [PDF]

open access: yesКомпьютерная оптика, 2018
It is noted that the best technical characteristics of optoelectronic microwave self-oscillators (OESO) are reached in schemes employing high-Q optical microresonators (OMR) working in the traveling wave modes (TWM).
Anatoly Zadorin, Anna Lukina
doaj   +1 more source

Vortex Laser Based on a Plasmonic Ring Cavity

open access: yesCrystals, 2021
The orbital angular momentum (OAM) of the structure light is viewed as a candidate for enhancing the capacity of information processing. Microring has advantages in realizing the compact lasers required for on-chip applications. However, as the clockwise
Xingyuan Wang, Xiaoyong Hu, Tianrui Zhai
doaj   +1 more source

OMNIDIRECTIONAL MILLIMETER-WAVELENGTH ANTENNAS BASED ON SEGMENTAL DIELECTRIC RESONATORS WHICH SUPPORT WHISPERING GALLERY MODES [PDF]

open access: yesRadio Physics and Radio Astronomy, 2023
Subject and Purpose. The subject of investigation is a new class of resonant-type transmit antennas intended for operation at millimeter wavelengths.
A. E. Kogut   +7 more
doaj   +1 more source

Nonlinear Optics in Microspherical Resonators

open access: yesMicromachines, 2020
Nonlinear frequency generation requires high intensity density which is usually achieved with pulsed laser sources, anomalous dispersion, high nonlinear coefficients or long interaction lengths.
Gabriele Frigenti   +3 more
doaj   +1 more source

A low temperature study of electromagnetic energy loss in low-loss materials in the 110…140 MHz frequency range [PDF]

open access: yesРадиофизика и электроника, 2020
Subject and Purpose. The subject of the study is spectral and energy characteristics of whispering-gallery disk resonators made up of low-loss microwave dielectric and semiconductor materials, namely, gold-doped silicon Si:Au, Chemical Vapor Deposition ...
V.N. Derkach   +5 more
doaj   +1 more source

Atom galleries for whispering atoms: binding atoms in stable orbits around an optical resonator [PDF]

open access: yes, 1994
The external fields of optical whispering gallery modes may be used to confine atoms in stable orbits around a dielectric microsphere. As an example, a toroidal dipole-force trap (atom gallery) for three-level atoms is investigated, and the possibility
Kimble, H. J., Mabuchi, H.
core   +1 more source

Naturally-phasematched second harmonic generation in a whispering gallery mode resonator [PDF]

open access: yes, 2010
We demonstrate for the first time natural phase matching for optical frequency doubling in a high-Q whispering gallery mode resonator made of Lithium Niobate.
C. Marquardt   +8 more
core   +3 more sources

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