Controllable optical quality factor in a two-ring-two-bus structure

2021 ◽  
Author(s):  
zhang ying ◽  
Huang qingzhong ◽  
Liu Qiang
Keyword(s):  
Quality Factor ◽  
Optical Quality ◽  
Bus Structure

scholarly journals A Vibrometer Based on Magnetorheological Optical Resonators

Vibration ◽  
2018 ◽  
Vol 1 (2) ◽  
pp. 239-249 ◽  
Author(s):  
Edoardo Rubino ◽  
Tindaro Ioppolo
Keyword(s):  
Permanent Magnet ◽  
Quality Factor ◽  
Polyvinyl Chloride ◽  
Optical Quality ◽  
Optical Resonator ◽  
Experimental Results ◽  
Whispering Gallery Modes ◽  
Moving Surface ◽  
Whispering Gallery ◽  
Optical Modes

This paper addresses the feasibility of an optical vibrometer that is based on the shift of the optical modes, also known as whispering gallery modes (WGMs), of a magnetorheological optical resonator. The optical resonator that is used in this study is fabricated by mixing polyvinyl chloride plastisol with magnetically polarizable particles. When a permanent magnet that is located nearby the optical resonator is moved, it induces a perturbation of the morphology of the resonator, due to the magnetostrictive effect. This change in the morphology induces a shift in the optical modes of the resonator. The shift of the optical modes can be related to the displacement of the permanent magnet. The proposed sensor concept is based on monitoring the displacement of a tiny magnet that is attached to a moving surface. The optical quality factor of the resonator used in these studies was of the order of 106. The experimental results show a sensitivity of 0.32 pm/μm and a resolution that is less than 300 nm.

Novel Ring Resonator Combining Strong Field Confinement With High Optical Quality Factor

2015 ◽  
Vol 27 (20) ◽  
pp. 2197-2200 ◽  
Author(s):  
Patrick Steglich ◽  
Christian Mai ◽  
David Stolarek ◽  
Stefan Lischke ◽  
Sebastian Kupijai ◽  
...  
Keyword(s):  
Quality Factor ◽  
Ring Resonator ◽  
Strong Field ◽  
Optical Quality ◽  
High Optical Quality

scholarly journals Tamm plasmon-polaritons structures with Bi-substituted garnet layers

2018 ◽  
Vol 185 ◽  
pp. 02016 ◽  
Author(s):  
Tatyana Mikhailova ◽  
Alexander Shaposhnikov ◽  
Anatoly Prokopov ◽  
Andrey Karavainikov ◽  
Sergey Tomilin ◽  
...  
Keyword(s):  
Electric Field ◽  
Quality Factor ◽  
Faraday Rotation ◽  
Light Wave ◽  
Optical Quality ◽  
Metal Coating ◽  
Magnetic Layers ◽  
Iron Garnet ◽  
Photonic Band ◽  
Plasmon Polaritons

New original Tamm plasmon-polaritons (TPP) structures with Bi-substituted iron garnet and Au plasmonic layers were proposed, synthesized and investigated. The structures with single and double garnet layers were modelled to form a TPP mode at the center of photonic band gab. The top Au layer has the gradient thickness varied in the range from 0 to 65.2 nm. It was found the features of TPP resonances as a function of the thickness of metal coating. The resonances on TPP have the maximum optical quality factor and transmission at the vicinity of Au thickness of 30 nm. These configurations are optimum to form the highest intensity of electric field of light wave in the area of the magnetic layers. It was found the spectral blue and red shifts of TPP mode with increasing of Au thickness. The blue and red shifts can be explained respectively by structural and thickness changes of Au coating. The maximum resonant values of Faraday rotation were –2.1° at 664 nm and –12.3° at 645 nm for structures with single and double garnet layers, respectively, and thickness of Au coating of 65.2 nm.

Ultra fast electro-optic tuning of optical quality factor

2008 ◽  
Author(s):  
Sasikanth Manipatruni ◽  
Carl Poitras ◽  
Qianfan Xu ◽  
Michal Lipson
Keyword(s):  
Quality Factor ◽  
Optical Quality ◽  
Electro Optic

High-speed electro-optic control of the optical quality factor of a silicon microcavity

2008 ◽  
Vol 33 (15) ◽  
pp. 1644 ◽  
Author(s):  
Sasikanth Manipatruni ◽  
Carl B. Poitras ◽  
Qianfan Xu ◽  
Michal Lipson
Keyword(s):  
Quality Factor ◽  
High Speed ◽  
Optical Quality ◽  
Electro Optic

Conventional band demultiplexer with high quality factor and transmission power based on four optimized shaped photonic crystal resonators

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Fateh Larioui ◽  
Mohamed Redha Lebbal ◽  
Touraya Bouchemat ◽  
Mohamed Bouchemat
Keyword(s):  
Quality Factor ◽  
Filter Design ◽  
Photonic Band Gap ◽  
Transmission Band ◽  
High Sensitivity ◽  
Spectral Width ◽  
Optical Quality ◽  
Transmission Ratio ◽  
Plane Wave Method ◽  
Photonic Band

AbstractIn this work, we propose a new filter design based on a ring resonator. This structure has 99% transmission ratio and high sensitivity to detect small refractive index variations of the order of 0.002. More specifically, the small size of this resonator gives the advantage to model a demultiplexer of size 463 µm2 based on four ports which operates in the conventional transmission band. Also, we show that our demultiplexer structure can reach more than 90% transmission ratio with an optical quality factor of about 3800, the spectral width is 0.72 nm and a crosstalk between −13.28 and −32.13. In our study, we emphasized the plane wave method to study the photonic band gap and FDTD to determine the transmission spectrum.

Analysis of Sputtered Zinc Oxide Films

1980 ◽  
Vol 38 ◽  
pp. 416-417
Author(s):  
T. A. Emma ◽  
M. P. Singh
Keyword(s):  
Electron Microscopy ◽  
Zinc Oxide ◽  
Piezoelectric Materials ◽  
Oxide Films ◽  
Optical Quality ◽  
Zno Films ◽  
Rf Power ◽  
X Ray Diffraction ◽  
Sputtered Films ◽  
Zinc Oxide Films

Optical quality zinc oxide films have been characterized using reflection electron diffraction (RED), replication electron microscopy (REM), scanning electron microscopy (SEM), and X-ray diffraction (XRD). Significant microstructural differences were observed between rf sputtered films and planar magnetron rf sputtered films. Piezoelectric materials have been attractive for applications to integrated optics since they provide an active medium for signal processing. Among the desirable physical characteristics of sputtered ZnO films used for this and related applications are a highly preferred crystallographic texture and relatively smooth surfaces. It has been found that these characteristics are very sensitive to the type and condition of the substrate and to the several sputtering parameters: target, rf power, gas composition and substrate temperature.

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