Behavior of multilayer light-sensitive resonant systems at irradiation

1997 ◽  
Author(s):  
Y. A. Lupashko ◽  
V. V. Mussil ◽  
Alexander P. Ovcharenko
Keyword(s):  
Resonant Systems

scholarly journals Enhanced two-photon photoluminescence assisted by multi-resonant characteristics of a gold nanocylinder

Nanophotonics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 4009-4019
Author(s):  
Artur Movsesyan ◽  
Gwénaëlle Lamri ◽  
Sergei Kostcheev ◽  
Anke Horneber ◽  
Annika Bräuer ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Enhancement Factor ◽  
Second Harmonic ◽  
Plasmon Mode ◽  
Excitation Wavelength ◽  
Resonant System ◽  
Two Photon ◽  
Plasmon Resonances ◽  
Resonant Systems ◽  
Photoluminescence Enhancement

AbstractMulti-resonant plasmonic simple geometries like nanocylinders and nanorods are highly interesting for two-photon photoluminescence and second harmonic generation applications, due to their easy fabrication and reproducibility in comparison with complex multi-resonant systems like dimers or nanoclusters. We demonstrate experimentally that by using a simple gold nanocylinder we can achieve a double resonantly enhanced two-photon photoluminescence of quantum dots, by matching the excitation wavelength of the quantum dots with a dipolar plasmon mode, while the emission is coupled with a radiative quadrupolar mode. We establish a method to separate experimentally the enhancement factor at the excitation and at the emission wavelengths for this double resonant system. The sensitivity of the spectral positions of the dipolar and quadrupolar plasmon resonances to the ellipticity of the nanocylinders and its impact on the two-photon photoluminescence enhancement are discussed.

Terahertz Characterization of External Resonant Systems by High-$T_{c}$ Josephson Junctions

2011 ◽  
Vol 21 (3) ◽  
pp. 306-310 ◽  
Author(s):  
Oleg Y. Volkov ◽  
Yuri Y. Divin ◽  
Vladimir N. Gubankov ◽  
Irina I. Gundareva ◽  
Valery V. Pavlovskiy
Keyword(s):  
Josephson Junctions ◽  
Resonant Systems

Optimal actuation of nonlinear resonant systems

2009 ◽  
Vol 41 (1) ◽  
pp. 65-86 ◽  
Author(s):  
Mohammad Kurdi ◽  
Philip Beran ◽  
Bret Stanford ◽  
Richard Snyder
Keyword(s):  
Resonant Systems

scholarly journals Enhanced avionic sensing based on Wigner’s cusp anomalies

2021 ◽  
Vol 7 (23) ◽  
pp. eabg8118
Author(s):  
Rodion Kononchuk ◽  
Joshua Feinberg ◽  
Joseph Knee ◽  
Tsampikos Kottos
Keyword(s):  
Cross Section ◽  
Linear Response ◽  
Nuclear Reactions ◽  
Exceptional Point ◽  
Small Perturbations ◽  
Differential Scattering Cross Section ◽  
Sensing Applications ◽  
Physical Observable ◽  
Resonant Systems ◽  
Square Root Singularity

Typical sensors detect small perturbations by measuring their effects on a physical observable, using a linear response principle (LRP). It turns out that once LRP is abandoned, new opportunities emerge. A prominent example is resonant systems operating near Nth-order exceptional point degeneracies (EPDs) where a small perturbation ε ≪ 1 activates an inherent sublinear response ∼εN≫ε in resonant splitting. Here, we propose an alternative sublinear optomechanical sensing scheme that is rooted in Wigner’s cusp anomalies (WCAs), first discussed in the framework of nuclear reactions: a frequency-dependent square-root singularity of the differential scattering cross section around the energy threshold of a newly opened channel, which we use to amplify small perturbations. WCA hypersensitivity can be applied in a variety of sensing applications, besides optomechanical accelerometry discussed in this paper. Our WCA platforms are compact, do not require a judicious arrangement of active elements (unlike EPD platforms), and, if chosen, can be cavity free.

scholarly journals Artificial neural networks for inverse design of resonant nanophotonic components with oscillatory loss landscapes

Nanophotonics ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 385-392
Author(s):  
Joeri Lenaerts ◽  
Hannah Pinson ◽  
Vincent Ginis
Keyword(s):  
Machine Learning ◽  
Optimization Procedure ◽  
Linear Mapping ◽  
Inverse Design ◽  
Design Parameters ◽  
Second Step ◽  
Input Parameters ◽  
Novel Variant ◽  
Resonant Systems ◽  
The Fourier Transform

AbstractMachine learning offers the potential to revolutionize the inverse design of complex nanophotonic components. Here, we propose a novel variant of this formalism specifically suited for the design of resonant nanophotonic components. Typically, the first step of an inverse design process based on machine learning is training a neural network to approximate the non-linear mapping from a set of input parameters to a given optical system’s features. The second step starts from the desired features, e.g. a transmission spectrum, and propagates back through the trained network to find the optimal input parameters. For resonant systems, this second step corresponds to a gradient descent in a highly oscillatory loss landscape. As a result, the algorithm often converges into a local minimum. We significantly improve this method’s efficiency by adding the Fourier transform of the desired spectrum to the optimization procedure. We demonstrate our method by retrieving the optimal design parameters for desired transmission and reflection spectra of Fabry–Pérot resonators and Bragg reflectors, two canonical optical components whose functionality is based on wave interference. Our results can be extended to the optimization of more complex nanophotonic components interacting with structured incident fields.

Resonances in 16O+16O and the Systematic Occurrence of Jπ=8+ Resonances in Heavy Ion Resonant Systems

2005 ◽  
pp. 407-408
Author(s):  
M. Gai ◽  
E. C. Schloemer ◽  
J. E. Freedman ◽  
A. C. Hayes ◽  
S. K. Korotky ◽  
...  
Keyword(s):  
Heavy Ion ◽  
Resonant Systems

scholarly journals Electrical Energy Transmission Systems at Elevated Frequency

2019 ◽  
Vol 8 (10) ◽  
pp. 1240-1243
Keyword(s):  
Power Transmission ◽  
Electrical Energy ◽  
Constant Current ◽  
Energy Transmission ◽  
Single Wire ◽  
Transmission Systems ◽  
Power Transmission Systems ◽  
Resonant Systems ◽  
Step Down ◽  
Elevated Frequency

The article presents information about the composition of the equipment of resonant power transmission systems. The resonant systems of electrical energy transmission by single-wire cable or overhead lines at elevated frequency include frequency conversion devices, power transmission lines, and devices for the reverse transformation of electrical energy to the voltage required by the consumer. In contrast to traditional systems of electrical power transmission, resonant systems are being operated on an elevated frequency of 5-15 kHz, a power transmission line voltage is 1-10 kV. In this case resonant transformers are used. The frequency of the power transmission system is set by the resonant transmitting transformer; the receiving transformer is a wideband step-down one.The main components of the resonant transmitting transformer are a power resonant circuit and a step-up/step-down winding. The maximum output power of the converter depends on the voltage supplied to the circuit, circuit voltage, circuit capacitance, frequency, and other parameters. One can change the transmitted power by changing the transmission frequency, for example, for lighting systems.Due to the fact that resonant power transmission systems operating at elevated frequency are less demanding on the grounding quality, they are more efficient compared to single wire ground return line operating at a constant current and an alternating current of commercial frequency

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