Coupled resonators

We present a novel low-power architecture for the generation of multilevel pulse amplitude modulation (PAM-4) signal generation. A new structure of a micro-ring resonator based on a 44 MMI (Multimode interference) coupler is proposed to control the coupling coefficient and Fano shapes.

11p viambani 18-06-2024 1 1   Download

Ebook "Dipolar correlation spectroscopy: Higher-order correlation terms in three-spin double electronelectron resonance (DEER)" presents experimental conditions which allow to extract the three-spin contribution precisely from experimental multi-spin double electron-electron resonance (DEER) signals. The theory and concepts behind the used techniques, which are among others broadband chirp pump pulses, over coupling of microwave resonators and echo reduction measurements, are discussed and explained in detail.

138p tudohanhtau1006 29-03-2024 11 1   Download

Ebook "Electron spin resonance: Analysis and interpretation" describes in mathematical terms the extraction of useful information from ESR spectra as applied to paramagnetic organic, inorganic and organometalic molecules. It lays a firm groundwork for understanding more sophisticated experiments, which the availability of newer commercial instruments has made possible.

186p coduathanh1122 27-03-2024 1 1   Download

Ebook "Principles and applications of ESR spectroscopy" fills the gap between the detailed monographs in ESR spectroscopy and the general textbooks in molecular physics, physical chemistry, biochemistry or spectroscopy. The latter only briefly explain the underlying theory and do not provide details about applications, while the currently available ESR textbooks are primarily focused on the technique as such.

468p manmanthanhla0201 26-02-2024 3 2   Download

Part 2 book "Particle accelerator physics" includes content: Hamiltonian resonance theory, hamiltonian nonlinear beam dynamics, charged particle acceleration, statistical and collective effects, beam–cavity interaction, dynamics of coupled motion, wake fields and instabilities, fundamental processes, overview of synchrotron radiation, theory of synchrotron radiation, insertion device radiation, free electron lasers,... and other contents.

457p muasambanhan07 08-02-2024 3 0   Download

Ebook "Localized surface plasmon resonance based nanobiosensors" introduces the fundamentals and applications of the localized surface plasmon resonance (LSPR) property of noble metallic nanoparticles, with an emphasis on the biosensing applications of plasmonic nanoparticles, especially in living cell imaging and photothermal therapy.

123p nhanphanguyet 28-01-2024 5 2   Download

The result show that taking into account the coupling between the deformation of the porous space and the capillary effects can radically modify the prediction of the temperature influence on the capillary curve.

12p vijeff 30-11-2023 10 4   Download

Continued part 1, part 2 of ebook "Electrical circuit theory and technology" provides readers with contents including: advanced circuit theory and technology; general reference; power in a.c. circuits; series resonance and Q-factor; mesh-current and nodal analysis; delta–star and star–delta transformations; maximum power transfer theorems and impedance matching; a numerical method of harmonic analysis; dielectrics and dielectric loss; magnetically coupled circuits; transients and laplace transforms;...

427p dangsovu 20-10-2023 6 3   Download

Continued part 1, part 2 of ebook "Circuit analysis: Theory and practice" provides readers with contents including: AC fundamentals; R, L, and C elements and the impedance concept; power in AC circuits; AC series-parallel circuits; methods of AC analysis; AC network theorems; resonance; filters and the bode plot; three-phase systems; transformers and coupled circuits; nonsinusoidal waveforms;...

562p dangsovu 20-10-2023 6 4   Download

We study the cascaded plasmon resonant field enhancement in core-shell nanoparticles using the coupled dipole method. It is found that internal field inside protein-conjugated gold nanoparticles remains constant for large wavelengths of light but is significantly enhanced at 5944 nm due to the screening from the protein shell.

4p viberbers 09-08-2023 5 3   Download

A low field benchtop electron spin resonance (ESR) (also referred to as electron paramagnetic resonance (EPR)) spectrometer is used to reveal paramagnetic centres such as oxygen vacancies and Ti+3 centres over 0.5%Pd/TiO2 . The measurement was performed at room temperature after the sample was reduced in situ under mild hydrogen pressures and evacuated to P < 10–6 Torr.

8p lyhuyenthu 31-01-2023 7 2   Download

In this paper, we investigate the design of directional couplers and microring resonators based on silicon wires. The aim is to design the directional coupler for high performance microring resonators.

4p vijaguar 16-11-2022 4 1   Download

In this paper, we present modeling and design of a bandpass filter for the use in Remote Radio Unit (RRU) transceivers (TRX) of Long Term Evolution Advantage (LTE-A) base stations. Generalized Chebyshev response is employed to synthesize the filter.

5p vispyker 16-11-2022 6 3   Download

In this paper, we present a novel structure for ultra-compact triplexer by using two staggered ring resonators that are coupled with straight directional couplers based on submicron waveguides.

4p vilexus 05-10-2022 8 4   Download

Part 1 of ebook "Spectrometric identification of organic compounds (6th Edition)" provide students with knowledge about: introduction; mass spectrometry; infrared spectrometry; proton magnetic resonance spectrometry; instrumentation and sample handling; simple spin coupling; chemical shift equivalence; megnetic equivalence; vicinal and germinal coupling; mass spectra of some chemical classes;...

230p colinhthu 09-08-2022 6 3   Download

The new complexes (1–3) were characterized by elemental analysis and spectroscopic methods and the molecular structure of 1a was determined by X-ray diffraction studies. These complexes were applied in the Suzuki–Miyaura cross-coupling reaction of phenylboronic acid with aryl halides in neat water. The activities of catalysts were monitored by gas chromatography–flame ionization detector and nuclear magnetic resonance.

10p langthannam 29-12-2021 12 0   Download

Schiff base derivatives NBAR and NSAR were developed for selective detection of Al3+ in aqueous solution. UV-vis spectroscopic studies revealed that NBAR and NSAR showed marked sensitivity and selectivity to Al3+ in acetonitrile (ACN)/water (v/v, 1:1, pH 6.80). The NBAR and NSAR receptors bound Al3+ in a 2:1 stoichiometry with apparent binding constants 4.09 × 10 11 M−2 and 1.65 × 10 12 M−2, respectively. They also displayed distinct changes in color upon the alteration of free Al3+ levels in solution with reversible responses and showed little interference with other metal ions.

10p langthannam 29-12-2021 3 0   Download

The synthesis of 3 benzimidazole-based ionic Pd(II)-NHC complexes (NHC:N -heterocyclic carbene) is presented. The structures of the complexes are as follows: [NHC-PdBr3]−[NHC]+. The ionic palladium(II)-NHC complexes were synthesized in high yields and were fully characterized by nuclear magnetic resonance spectroscopy, X-ray diffraction, LC-MS/MS, and elemental analysis. These complexes have been identified as active catalysts in Suzuki–Miyaura reactions in a solution of 2-propanol and water at room temperature for different aryl bromides.

20p tudichquannguyet 29-11-2021 10 1   Download

Three new dibenzimidazolium salts bridged by 2-methylenepropane-1,3-diyl group were synthesized. Their dinuclear N-heterocyclic carbene Ag(I) complexes were prepared by the reactions of these salts with Ag2 O. The structures of the synthesized compounds were defined by nuclear magnetic resonance (NMR), Fourier-transform infrared spectroscopy (FT-IR), elemental analysis, and LC-MSMS (for complexes) techniques. Stability of the silver complexes was confirmed by 1H NMR spectroscopy.

36p tudichquannguyet 29-11-2021 9 0   Download

The proposed system is composed of two symmetric disk-pair layers, called the disk-pair dimer, that exhibited two identical but coupled magnetic resonances at the same frequency. This unique design allows to absorb the electromagnetic energy at the transmission mode, which is rarely achieved in the conventional modes. By optimizing the coupling strength between two disk-pair layers, a total absorptivity could be enhanced up to 90%.

7p parasite 02-06-2021 10 1   Download