Lithium niobate whispering gallery mode disk resonator with high Q factor

We report the design and optimized fabrication of deformed whispering gallery mode resonators in silica with solely ICP-RIE. This allows us to control the morphology of the resonators more freely and results in low surface roughness. The light was coupled into the resonator using a state of the art tapered fiber approach and we determined the Q-factor in the range of 105

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High Q-factor sapphire whispering gallery mode microwave resonator at single photon energies and millikelvin temperatures

Applied Physics Letters ◽

10.1063/1.3595942 ◽

2011 ◽

Vol 98 (22) ◽

pp. 222903 ◽

Cited By ~ 32

Author(s):

Daniel L. Creedon ◽

Yarema Reshitnyk ◽

Warrick Farr ◽

John M. Martinis ◽

Timothy L. Duty ◽

...

Keyword(s):

Single Photon ◽

Whispering Gallery Mode ◽

Microwave Resonator ◽

Q Factor ◽

High Q ◽

Whispering Gallery ◽

Millikelvin Temperatures

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Influence of the Surface Roughness of a Silicon Disk Resonator on Its Q-Factor

Photonics ◽

10.3390/photonics8060225 ◽

2021 ◽

Vol 8 (6) ◽

pp. 225

Author(s):

A. V. Yakuhina ◽

A. S. Kadochkin ◽

D. V. Gorelov ◽

V. V. Svetukhin ◽

S. S. Generalov ◽

...

Keyword(s):

Surface Roughness ◽

Finite Difference Time Domain ◽

Fdtd Method ◽

Whispering Gallery Mode ◽

Q Factor ◽

Disk Resonator ◽

Whispering Gallery ◽

Atomic Force ◽

Difference Time ◽

Wgm Resonators

This article presents a silicon disk resonator of the whispering-gallery-mode (WGM) type. The calculated Q-factor of the silicon WGM resonator was 107. Two methods of studying the surface roughness of a silicon WGM resonator with a nonlinear profile by means of Helios 650 scanning electron microscope and Bruker atomic force microscope (AFM) are presented. The results obtained by the two methods agreed well with each other. A comparison of the surface roughness values of WGM resonators manufactured using different technological approaches is presented. Based on the obtained data, a preliminary estimated Q-factor calculation of the resonators was performed, which was refined by numerical calculation using the finite-difference time-domain (FDTD) method. The effect of the surface roughness of the resonator on its Q-factor was found. Reducing the surface roughness of the resonator from 30 nm to 1–2 nm led to an increase in its Q-factor from 104 to 107.

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Ovalbumin Based Microlasers

VNU Journal of Science Mathematics - Physics ◽

10.25073/2588-1124/vnumap.4504 ◽

2020 ◽

Vol 36 (2) ◽

Author(s):

Hanh Hong Mai

Keyword(s):

Cost Effective ◽

Whispering Gallery Mode ◽

Q Factor ◽

Weight Percentage ◽

High Q ◽

Whispering Gallery ◽

Environmental Friendly ◽

Low Weight ◽

Low Threshold ◽

Biological And Medical Applications

In this work, biomaterial based microlasers were successfully fabricated by a cost effective, simple and environmental friendly fabrication method. The as-fabricated microlasers were made of biocompatible material including ovalbumin doped Rhodamine B at low weight percentage. The lasers had solid-state spheres with various diameters ranging from 20 µm to over 100 µm. It was shown that inside the spherical cavity which supported whispering gallery mode, a lasing emission was generated with a low threshold of 17.5 µJ/mm2, and a high Q-factor of approximately 3000. The remarkable lasing properties of the dye doped ovalbumin microlasers are considered as important bases for their future biological and medical applications.

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