Results 21 to 30 of about 5,669 (172)

Photonic lenses with whispering gallery waves at Janus particles

open access: yesOpto-Electronic Science, 2022
We show that electric field on the plane surface of truncated sphere or cylinders (so called Janus particles) have sharp resonances versus the depth of removed segment of a sphere or cylinder.
Igor V. Minin   +5 more
doaj   +1 more source

Deep-learning powered whispering gallery mode sensor based on multiplexed imaging at fixed frequency

open access: yesOpto-Electronic Advances, 2020
During the last decades the whispering gallery mode based sensors have become a prominent solution for label-free sensing of various physical and chemical parameters.
Saetchnikov Anton V.   +3 more
doaj   +1 more source

Coexistence of electron whispering-gallery modes and atomic collapse states in graphene/WSe2 heterostructure quantum dots

open access: yesNature Communications, 2022
The whispering-gallery mode and the atomic collapse state are two distinct resonances in condensed matter associated with relativistic massless charge carriers. Now, it is shown that these states can coexist in graphene/WSe2 heterostructure quantum dots.
Qi Zheng   +3 more
doaj   +1 more source

Wavelength Sensing Based on Whispering Gallery Mode Mapping

open access: yesFibers, 2022
We demonstrate a wavelength sensor based on whispering gallery mode (WGM) resonators. For the first time, multiple polymethyl methacrylate (PMMA) microspheres were simultaneously attached to a tapered fiber.
Roberts Berkis   +7 more
doaj   +1 more source

Modal domains and selectivity in large square lasers

open access: yesJournal of Microwaves, Optoelectronics and Electromagnetic Applications
Modes in square resonators have C4v symmetry. A special set of modes in these resonators have odd parities and behave like whispering gallery modes. These quasi-whispering gallery modes have high quality factors and exhibit interesting features.
Liming Liu   +2 more
doaj   +1 more source

Label-Free Biological and Chemical Sensing Using Whispering Gallery Mode Optical Resonators: Past, Present, and Future

open access: yesSensors, 2017
Sensitive and rapid label-free biological and chemical sensors are needed for a wide variety of applications including early disease diagnosis and prognosis, the monitoring of food and water quality, as well as the detection of bacteria and viruses for ...
Judith Su
doaj   +1 more source

Carrier-induced refractive index change observed by a whispering gallery mode shift in GaN microrods

open access: yesNew Journal of Physics, 2015
Vertical oriented GaN microrods were grown by metal-organic vapor phase epitaxy with four different n-type carrier concentration sections above 10 ^19 cm ^−3 along the c -axis.
C Tessarek   +4 more
doaj   +1 more source

Development of measuring system of whispering gallery mode resonances for evaluating a diameter of microsphere

open access: yesNihon Kikai Gakkai ronbunshu, 2019
A sphere is a frequently used shape as a reference of calibration for 3-dimensional measurement instruments because of its isotropic shape. It is demanded to measure the diameter of the reference sphere with high accuracy.
Masaki MICHIHATA   +4 more
doaj   +1 more source

Optical Whispering‐Gallery Mode as a Fingerprint of Magnetic Ordering in Van der Waals Layered CrSBr

open access: yesAdvanced Functional Materials, EarlyView.
A novel nanoscale optomagnetic sensing approach is developed using whispering‐gallery mode resonances in a self‐rolled‐up microcavity. This method enables ultra‐sensitive detection of weak magnetism by correlating resonance shifts with magnetic susceptibility.
Chi Pang   +13 more
wiley   +1 more source

Split-disk micro-lasers: Tunable whispering gallery mode cavities

open access: yesAPL Photonics, 2017
Optical micro-cavities of various types have emerged as promising photonic structures, for both the investigation of fundamental science in cavity quantum electrodynamics and simultaneously for various applications, e.g., lasers, filters, or modulators ...
T. Siegle   +3 more
doaj   +1 more source

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