A method for evaluating a complex permittivity of dielectric material by using whispering gallery modes on a spherical resonator

2006 ◽  
Author(s):  
Mari Matsubara ◽  
Yoshinori Kogami ◽  
Yoshiro Tomabechi
Keyword(s):  
Complex Permittivity ◽  
Dielectric Material ◽  
Whispering Gallery Modes ◽  
Spherical Resonator ◽  
Whispering Gallery

Temperature Sensing of Joule Heating Inside an Optical Whispering-Gallery Mode Micro-Annulus

2012 ◽  
Author(s):  
Matthew Frenkel ◽  
Marlon Avellan ◽  
Zhixiong Guo
Keyword(s):  
High Resolution ◽  
Temperature Change ◽  
Joule Heating ◽  
Dielectric Material ◽  
Whispering Gallery Mode ◽  
Temperature Sensing ◽  
Whispering Gallery Modes ◽  
Whispering Gallery ◽  
Micro Sphere ◽  
A Current

It has been previously demonstrated that the optical whispering-gallery modes inside a micro-sphere resonators can be used for extremely sensitive temperature sensing. This work attempts to utilize the high-resolution measurements of an optical micro-annulus in order to detect the temperature change in a current carrying wire. A wire is coated with a thin layer of dielectric material as an annular sensor and positioned next to an optical taper. Current is then run through the wire to create joule heating and the temperature change is correlated with the frequency shift in the whispering-gallery mode resonance inside the micro-annulus. The experimental results will be analyzed and presented.

scholarly journals A shielded planar dielectric resonator with whispering gallery modes

2019 ◽  
Vol 63 (4) ◽  
pp. 478-485
Author(s):  
A. Ye. Kogut ◽  
I. K. Kuzmichev ◽  
R. S. Dolia ◽  
S. O. Nosatiuk ◽  
Ye. A. Shulha ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Dielectric Material ◽  
Whispering Gallery Modes ◽  
Homogeneous Distribution ◽  
Q Factor ◽  
Curvilinear Surface ◽  
Resonant Field ◽  
Whispering Gallery ◽  
Metal Shield ◽  
Dielectric Disk

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. These resonators are formed by a thin (compared to the operating wavelength) disk dielectric structure, located between two conducting planes. Thus, the E-field of the resonator was limited along the height of the planar disk by two conducting surfaces. The resonance properties of such a structure are determined by the condition of total internal reflection of waves from the internal curvilinear surface of a dielectric disk. The carried out investigations shown that the unloaded Q-factor is increased at the arrangement of planar dielectric disk inside the ring metal shield at the certain ratio of the radiuses of the shield and dielectric disk. The Q-factor of the shielded resonant structure at the high-frequency edge increases to 40 %. The partial displacement of the resonant field of the WGMs modes from the dielectric to the air gap is the cause of this effect. It leads to decrease in losses in the dielectric material. A computer simulation of the WGMs fields in the planar DR was carried out using the CST Microwave Studio 2013 software to confirm this effect. In addition, computer simulation results shown that these WGMs in the planar DR are characterized by a homogeneous distribution of the resonant field along the axial coordinate. The perspectives of using planar DR in solid-state Ka-band oscillators are shown.

High-Q whispering gallery modes in pillar microcavities

2007 ◽  
Vol 32 (2-3) ◽  
pp. 123-126
Author(s):  
Y.-R. Nowicki-Bringuier ◽  
J. Claudon ◽  
C. Böckler ◽  
S. Reitzenstein ◽  
M. Kamp ◽  
...  
Keyword(s):  
Whispering Gallery Modes ◽  
High Q ◽  
Whispering Gallery

Size-dependent whispering gallery modes in Au-coated ZnO microrods

2021 ◽  
Author(s):  
F. Bellarmine ◽  
Senthil Kumar Eswaran ◽  
Ramanjaneyulu Mannam ◽  
M. S. Ramachandra Rao
Keyword(s):  
Whispering Gallery Modes ◽  
Whispering Gallery ◽  
Size Dependent

On the Abramov approach for the approximation of whispering gallery modes in prolate spheroids

2020 ◽  
pp. 125599
Author(s):  
Pierluigi Amodio ◽  
Anton Arnold ◽  
Tatiana Levitina ◽  
Giuseppina Settanni ◽  
Ewa B. Weinmüller
Keyword(s):  
Whispering Gallery Modes ◽  
Whispering Gallery ◽  
Prolate Spheroids
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