RESONANCE INCREASE OF THE Q-FACTOR OF MAGNETIC-TYPE EIGENOSCILLATIONS IN AN OPEN RESONATOR WITH BALL-SHAPED DIELECTRIC INSERTION

2014 ◽  
Vol 73 (11) ◽  
pp. 943-953 ◽  
Author(s):  
Yu. V. Svishchov
Keyword(s):  
Open Resonator ◽  
Q Factor ◽  
Magnetic Type

scholarly journals Sound Trapping in an Open Resonator

2021 ◽  
Author(s):  
Lujun Huang ◽  
Yan Kei Chiang ◽  
Sibo Huang ◽  
Chen Shen ◽  
Fu Deng ◽  
...  
Keyword(s):  
Quality Factor ◽  
Mirror Symmetry ◽  
Bound States ◽  
Open Resonator ◽  
Acoustic Resonator ◽  
Q Factor ◽  
Order Of Magnitude ◽  
Symmetry Protected ◽  
Quality Factor Q ◽  
Mode Interference

Abstract The ability of extreme sound energy confinement with high-quality factor (Q-factor) resonance is of vital importance for acoustic devices requiring high intensity and hypersensitivity in biological ultrasonics, enhanced collimated sound emission (i.e. sound laser) and high-resolution sensing. However, structures reported so far demonstrated a limited quality factor (Q-factor) of acoustic resonances, up to several tens in an open resonator. The emergence of bound states in the continuum (BIC) makes it possible to realize high-Q factor acoustic modes. Here, we report the theoretical design and experimental demonstration of acoustic BICs supported by a single open resonator. We predicted that such an open acoustic resonator could simultaneously support three types of BICs, including symmetry protected BIC, Friedrich-Wintgen BIC induced by mode interference, as well as a new kind of BIC: mirror-symmetry induced BIC. We also experimentally demonstrated the existence of all three types of BIC with Q-factor up to one order of magnitude greater than the highest Q-factor reported in an open resonator.

Accurate measurement of the Q factor of an open resonator in the W‐band frequency range

1992 ◽  
Vol 63 (8) ◽  
pp. 3877-3880 ◽  
Author(s):  
R. K. Mongia ◽  
R. K. Arora
Keyword(s):  
Open Resonator ◽  
Q Factor ◽  
Frequency Range ◽  
Band Frequency ◽  
W Band
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