Results 41 to 50 of about 19,826 (214)

Whispering gallery mode

open access: yesEos, Transactions American Geophysical Union, 1973
High altitude balloon platforms positioned a thousand miles apart have been used successfully in an experiment to establish the feasibility of a technique for propagating medium length radio waves through the D layer, the lower layer of the ionosphere.The new technique is called the D‐Layer Whispering Gallery Mode because of its similarity to the ...
openaire   +1 more source

A scatterer‐assisted whispering‐gallery‐mode microprobe

open access: yesNanophotonics, 2018
Abstract A fiber‐based whispering‐gallery‐mode (WGM) microprobe, combining both the high optical field enhancement of the WGMs and the compact structure of the optical fiber, is highly desired for sensing and imaging. Here we report a WGM microsphere resonator coupled to a single‐mode fiber interfaced by a graded‐index lens.
Shu Fangjie   +3 more
openaire   +3 more sources

Low threshold Rhodamine-doped whispering gallery mode microlasers fabricated by direct laser writing

open access: yesScientific Reports, 2017
The combination of the outstanding properties of whispering gallery modes with both the flexibility and ease of processing of polymers is particularly attractive for photonics applications.
Nathália B. Tomazio   +2 more
doaj   +1 more source

Directional emission from asymmetric resonant cavities [PDF]

open access: yes, 1996
Asymmetric resonant cavities (ARCs) with highly non-circular but convex cross-sections are predicted theoretically to have high-Q whispering gallery modes with very anisotropic emission.
Chang, Richard K.   +4 more
core   +5 more sources

Self‐Assembled Inorganic Nanomembrane Tubes: Rolled‐Up Piezoelectrics for Microacoustic Wave‐Based Actuators and Sensors

open access: yesAdvanced Materials, EarlyView.
This study demonstrates a self‐assembly process to generate free‐standing piezoelectric nanomembranes, forming ultracompact microtubular acoustic wave sensors and actuators. The miniaturized 3D piezoelectric platform reported in this work can be applied in telecommunication, energy harvesting, and acoustofluidics. Moreover, the 3D self‐assembly can add
Raphaël C. L‐M. Doineau   +9 more
wiley   +1 more source

Microfluidic flowmeter based on a liquid crystal-filled nested capillary

open access: yesCommunications Engineering
Microfluidic flowmeters are a powerful and highly accurate tool, enabling precise monitoring and measurements of flows of gases and fluids in a range of applications.
Zhe Wang   +7 more
doaj   +1 more source

A shielded planar dielectric resonator with whispering gallery modes

open access: yesВесці Нацыянальнай акадэміі навук Беларусі: Серыя фізіка-тэхнічных навук, 2019
The spectral and energy characteristics of two planar dielectric resonators (DRs), open and shielded from the curvilinear surface, excited in higher-order modes as whispering gallery modes (WGMs) in Ka-waveband are investigated.
A. Ye. Kogut   +5 more
doaj   +1 more source

Probing higher order optical modes in all-dielectric nanodisk, -square, and -triangle by aperture type scanning near-field optical microscopy

open access: yesNanophotonics, 2021
All-dielectric nanoantennas, consisting of high refractive index semiconductor material, are drawing a great deal of attention in nanophotonics. Owing to their ability to manipulate efficiently the flow of light within sub-wavelength volumes, they have ...
Frolov Aleksandr Yu.   +6 more
doaj   +1 more source

Static and Dynamic Spectroscopy of (Al,Ga)As/GaAs Microdisk Lasers with Interface Fluctuation Quantum Dots

open access: yes, 2005
We have studied the steady state and dynamic optical properties of semiconductor microdisk lasers whose active region contains interface fluctuation quantum dots in GaAs/(Ga,Al)As quantum wells.
C. H. Henry   +6 more
core   +1 more source

Cavity QED with high-Q whispering gallery modes [PDF]

open access: yes, 1998
We report measurements of cavity-QED effects for the radiative coupling of atoms in a dilute vapor to the external evanescent field of a whispering-gallery mode (WGM) in a fused silica microsphere.
Furusawa, A.   +4 more
core   +1 more source

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