High-Quality-Factor AlON Transparent Ceramics for 5 GHz Wi-Fi Aesthetically Decorative Antennas

2021 ◽  
Author(s):  
Chao Du ◽  
Di Zhou ◽  
Shu-Zhao Hao ◽  
He-Tuo Chen ◽  
Jian Zhang ◽  
...  
Keyword(s):  
Quality Factor ◽  
High Quality Factor ◽  
Transparent Ceramics ◽  
High Quality ◽  
5 Ghz

A Long Bar Type Silicon Resonator with a High Quality Factor

2014 ◽  
Vol 134 (2) ◽  
pp. 26-31 ◽  
Author(s):  
Nguyen Van Toan ◽  
Masaya Toda ◽  
Yusuke Kawai ◽  
Takahito Ono
Keyword(s):  
Quality Factor ◽  
High Quality Factor ◽  
High Quality ◽  
Type Silicon ◽  
Silicon Resonator

scholarly journals Coherent suppression of backscattering in optical microresonators

2020 ◽  
Vol 9 (1) ◽  
Author(s):  
Andreas Ø. Svela ◽  
Jonathan M. Silver ◽  
Leonardo Del Bino ◽  
Shuangyou Zhang ◽  
Michael T. M. Woodley ◽  
...  
Keyword(s):  
Quality Factor ◽  
Bulk Material ◽  
Near Field ◽  
High Quality Factor ◽  
Dual Frequency ◽  
High Quality ◽  
Frequency Combs ◽  
Optical Microresonators ◽  
Whispering Gallery ◽  
The Stability

AbstractAs light propagates along a waveguide, a fraction of the field can be reflected by Rayleigh scatterers. In high-quality-factor whispering-gallery-mode microresonators, this intrinsic backscattering is primarily caused by either surface or bulk material imperfections. For several types of microresonator-based experiments and applications, minimal backscattering in the cavity is of critical importance, and thus, the ability to suppress backscattering is essential. We demonstrate that the introduction of an additional scatterer into the near field of a high-quality-factor microresonator can coherently suppress the amount of backscattering in the microresonator by more than 30 dB. The method relies on controlling the scatterer position such that the intrinsic and scatterer-induced backpropagating fields destructively interfere. This technique is useful in microresonator applications where backscattering is currently limiting the performance of devices, such as ring-laser gyroscopes and dual frequency combs, which both suffer from injection locking. Moreover, these findings are of interest for integrated photonic circuits in which back reflections could negatively impact the stability of laser sources or other components.

Multifold coupling enabled high quality factor toroidal resonances in metasurfaces

2020 ◽  
Vol 127 (19) ◽  
pp. 193103
Author(s):  
Deepak Kumar ◽  
Surya Pranav Ambatipudi ◽  
Sabyasachi Banerjee ◽  
Ranjan Kumar ◽  
Dibakar Roy Chowdhury
Keyword(s):  
Quality Factor ◽  
High Quality Factor ◽  
High Quality

scholarly journals Fabricating centimeter-scale high quality factor two-dimensional periodic photonic crystal slabs

2014 ◽  
Vol 22 (3) ◽  
pp. 3724 ◽  
Author(s):  
Jeongwon Lee ◽  
Bo Zhen ◽  
Song-Liang Chua ◽  
Ofer Shapira ◽  
Marin Soljačić
Keyword(s):  
Photonic Crystal ◽  
Quality Factor ◽  
High Quality Factor ◽  
Two Dimensional ◽  
High Quality ◽  
Photonic Crystal Slabs
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