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.

Temperature sensing by using whispering gallery modes with hollow core fibers

2010 ◽  
Vol 21 (9) ◽  
pp. 094015 ◽  
Author(s):  
Bilal Özel ◽  
Ralf Nett ◽  
Thomas Weigel ◽  
Gustav Schweiger ◽  
Andreas Ostendorf
Keyword(s):  
Temperature Sensing ◽  
Whispering Gallery Modes ◽  
Hollow Core ◽  
Whispering Gallery

scholarly journals Review of biosensing with whispering-gallery mode lasers

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Nikita Toropov ◽  
Gema Cabello ◽  
Mariana P. Serrano ◽  
Rithvik R. Gutha ◽  
Matías Rafti ◽  
...  
Keyword(s):  
Biological Samples ◽  
Whispering Gallery Mode ◽  
Photonic Devices ◽  
Whispering Gallery Modes ◽  
Label Free ◽  
Virus Particles ◽  
Whispering Gallery ◽  
Label Free Detection ◽  
Basic Concepts ◽  
Wgm Resonators

AbstractLasers are the pillars of modern optics and sensing. Microlasers based on whispering-gallery modes (WGMs) are miniature in size and have excellent lasing characteristics suitable for biosensing. WGM lasers have been used for label-free detection of single virus particles, detection of molecular electrostatic changes at biointerfaces, and barcode-type live-cell tagging and tracking. The most recent advances in biosensing with WGM microlasers are described in this review. We cover the basic concepts of WGM resonators, the integration of gain media into various active WGM sensors and devices, and the cutting-edge advances in photonic devices for micro- and nanoprobing of biological samples that can be integrated with WGM lasers.

scholarly journals Efficient coupling of free propagating light into Whispering Gallery Modes

2021 ◽  
Vol 255 ◽  
pp. 04002
Author(s):  
Xavier Zambrana-Puyalto ◽  
Davide D’Ambrosio ◽  
Gianluca Gagliardi
Keyword(s):  
Coupling Efficiency ◽  
Whispering Gallery Mode ◽  
Cylindrical Symmetry ◽  
Whispering Gallery Modes ◽  
Spherical Particles ◽  
Whispering Gallery ◽  
Efficient Coupling ◽  
Mode Purity ◽  
Experimental Values ◽  
Dielectric Structures

Whispering Gallery Mode resonators are dielectric structures with cylindrical symmetry. They are typically excited with an evanescent field leaking out of a tapered fiber or a waveguide. It is also known that they can be excited with free propagating beams. In this work, we use a recently developed analytical model which quantitatively describes the coupling of free propagating beams into Whispering Gallery Modes for spherical particles. Using this model, we have been able to theoretically quantify the mode purity and the coupling efficiency of a resonant Whispering Gallery Mode of an order j*= 1456. We have observed that the transverse position of the beam plays a crucial role in determining the mode purity and coupling efficiency. Last but not least, we have verified that the coupling efficiency as well as the Q-factor predicted by our model are in an outstanding agreement with the experimental values measured on a microresonator of the same dimensions as the simulated one.

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.

scholarly journals Research of Constructive and Technological Methods for Forming a Silicon Disk Resonator with Whispering Gallery Modes

Photonics ◽  
2020 ◽  
Vol 7 (2) ◽  
pp. 31
Author(s):  
Anastasia Yakuhina ◽  
Alexey Kadochkin ◽  
Vladimir Amelichev ◽  
Dmitry Gorelov ◽  
Sergey Generalov
Keyword(s):  
Wedge Angle ◽  
Whispering Gallery Mode ◽  
Whispering Gallery Modes ◽  
Plasma Chemical ◽  
Minimum Loss ◽  
Disk Resonator ◽  
Whispering Gallery ◽  
Plasma Chemical Etching ◽  
Mode Stability ◽  
Technological Methods

This article presents the results of a computer simulation of whispering gallery modes in the structure of a silicon disk resonator with a wedge-shaped profile made on a silicon-on-isolator base (SOI). The rationale for the choice of silicon as a material for its manufacturing is given. The results of the study of the influence of the wedge angle on the whispering gallery mode parameters (WGM) are presented. The optimum wedge angle of a silicon disk resonator is determined, which ensures the minimum loss and maximum mode stability. The technological aspects of plasma-chemical etching processes for forming a wedge-shaped profile of the edge of a silicon disk resonator are studied.

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