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A Dual-Frequency Coupled Resonator Transducer
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2020New ultrasound-mediated drug delivery systems, such as acoustic cluster therapy or combined imaging and therapy systems, require transducers that can operate beyond the bandwidth limitation (~100%) of conventional piezoceramic transducers. In this article, a dual-frequency coupled resonator transducer (CRT) comprised of a polymeric coupling layer with ...
Kenneth Kirkeng Andersen +3 more
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Frequency coupling in dual frequency capacitively coupled radio-frequency plasmas
Applied Physics Letters, 2006An industrial, confined, dual frequency, capacitively coupled, radio-frequency plasma etch reactor (Exelan®, Lam Research) has been modified for spatially resolved optical measurements. Space and phase resolved optical emission spectroscopy yields insight into the dynamics of the discharge.
Gans, Timo +6 more
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Coupled Ring Resonators at Fibonacci Frequencies
2020 22nd International Conference on Transparent Optical Networks (ICTON), 2020Since the Middle Ages, Fibonacci (FB) numbers have attracted the interest of many scientists. In the recent years, a great research effort has been spent on the applications of FB numbers and sequences. It has been demonstrated that also some properties of resonant electronic systems are related to FB numbers. In this paper, an optical resonant device,
Ciminelli C. +3 more
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Cross-frequency coupling between neuronal oscillations
Trends in Cognitive Sciences, 2007Electrophysiological recordings in animals, including humans, are modulated by oscillatory activities in several frequency bands. Little is known about how oscillations in various frequency bands interact. Recent findings from the human neocortex show that the power of fast gamma oscillations (30-150Hz) is modulated by the phase of slower theta ...
Ole, Jensen, Laura L, Colgin
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Single-frequency coupled asymmetric microcavity laser
Optics Letters, 2008Single-mode lasing from a coupled asymmetric microcavity is achieved. By coupling two size mismatched circular microrings to form a coupled asymmetric microcavity, multi-whispering-gallery modes are successfully suppressed and single-frequency laser emission is robustly obtained.
Lei, Shang, Liying, Liu, Lei, Xu
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Coupled-Resonator Filters With Frequency-Dependent Couplings: Coupling Matrix Synthesis
IEEE Microwave and Wireless Components Letters, 2012This letter presents a novel technique for synthesis of coupled-resonator filters with inter-resonator couplings varying linearly with frequency. The values of non-zero elements of the coupling matrix are found by solving a nonlinear least squares problem involving eigenvalues of matrix pencils derived from the coupling matrix and reference zeros and ...
Lukasz Szydlowski +2 more
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Cross-Frequency Coupling in Childhood Absence Epilepsy
Brain Connectivity, 2022Objective: Absence seizures are the prototypic primarily generalized seizures, but there is incomplete understanding regarding their generation and maintenance. A core network for absence seizures has been defined, including focal cortical and thalamic regions that have frequency-dependent interactions.
Jeffrey R. Tenney +2 more
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Effects of reactor geometry and frequency coupling on dual-frequency capacitively coupled plasmas
Plasma Sources Science and Technology, 2013In dual-frequency (DF) capacitively coupled plasma discharges, the effect of reactor geometry on the plasma density is investigated by means of a two-dimensional self-consistent fluid model combined with a power supply computation module. The results indicate that by enlarging the inter-electrode gap or by blocking the electrode with dielectric ...
Zhen-Hua Bi +4 more
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