Results 21 to 30 of about 15,725 (240)

In-Vivo and Ex-Vivo Measurements of Blood Glucose Using Whispering Gallery Modes

open access: yesSensors, 2020
The permittivity of blood glucose is not a strong function of its concentration in microwave or millimeter-wave frequencies. Measuring glucose concentrations remains a challenge, particularly in the presence of interference caused by the ambient leaky ...
Louis W. Y. Liu   +8 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

Optical whispering gallery mode resonators: analysing thermo-optic tuning in a silicon sphere. [PDF]

open access: yesJ R Soc N Z
ABSTRACT In this work, we discuss and experimentally investigate the whispering gallery modes (WGMs) in a 500 μm radius silicon sphere. We begin by reviewing the basics of WGM resonators, followed by simulations and experimental results obtained with the aforementioned silicon spherical WGM resonator. The recorded WGM signatures in the transmission and
Azeem F   +5 more
europepmc   +2 more sources

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

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