Phase-shift based expansions for material and frequency dependence of scattering and of radiation forces

2018 ◽  
Vol 144 (3) ◽  
pp. 1896-1896
Author(s):  
Philip L. Marston
Keyword(s):  
Phase Shift ◽  
Frequency Dependence ◽  
Radiation Forces

scholarly journals Theory of a frequency-dependent beam splitter in the form of coupled waveguides

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Dmitry N. Makarov
Keyword(s):  
Phase Shift ◽  
Reflection Coefficient ◽  
Quantum Optics ◽  
Frequency Dependence ◽  
Transmission Coefficient ◽  
Beam Splitter ◽  
Interaction Time ◽  
Constant Coefficients ◽  
Independent Parameters ◽  
Coupled Waveguides

AbstractIt is known that the beam splitter in the form of coupled waveguides (BS) is one of the main devices used in quantum optics and quantum technologies. A BS has two independent parameters: one is the reflection coefficient R or the transmission coefficient T, where $$R+T=1$$ R + T = 1 ; the second is the phase shift $$\phi $$ ϕ . In various applications of quantum optics, these coefficients are considered constant. This is due to the fact that the frequency dependence of these coefficients is usually not taken into account, or this dependence is such that it cannot affect the constancy of these coefficients. It is shown that the coefficients R, T and phase shift $$\phi $$ ϕ are generally values that depend on the frequencies of incoming photons, the interaction time of photons in the BS, and the type of BS. It is established that in general, R, T and $$\phi $$ ϕ cannot be considered constant coefficients, and the criteria for when they can be considered constant are defined. The results obtained must be taken into account when analyzing and planning experiments where the beam splitter is presented in the form of coupled waveguides.

Frequency dependence of the phase shift in optical-fibre thermal modulators

1995 ◽  
Vol 27 (5) ◽  
pp. 335-341 ◽  
Author(s):  
J.B. Brown ◽  
J.D.C. Jones ◽  
S.J. Rogers ◽  
R.K.Y. Chan ◽  
H.H. Wong
Keyword(s):  
Phase Shift ◽  
Frequency Dependence ◽  
Optical Fibre ◽  
Thermal Modulators

scholarly journals On the technique of the inversion of helioseismological data

1988 ◽  
Vol 123 ◽  
pp. 137-140
Author(s):  
M.A. Brodsky ◽  
S. V. Vorontsov
Keyword(s):  
Phase Shift ◽  
Frequency Dependence ◽  
Sound Speed ◽  
Numerical Results ◽  
Speed Profile ◽  
Sound Speed Profile ◽  
Inversion Technique ◽  
Independent Determination ◽  
Effective Phase

The asymptotic inversion technique is developed, including independent determination of the sound speed profile and frequency dependence of the effective phase shift. Numerical results are presented.

scholarly journals Investigation of AC Electrical Properties of MXene-PCL Nanocomposites for Application in Small and Medium Power Generation

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7123
Author(s):  
Tomasz N. Kołtunowicz ◽  
Piotr Gałaszkiewicz ◽  
Konrad Kierczyński ◽  
Przemysław Rogalski ◽  
Paweł Okal ◽  
...  
Keyword(s):  
Phase Shift ◽  
Frequency Dependence ◽  
Electron Tunneling ◽  
Max Phase ◽  
Frequency Range ◽  
Electrospun Membrane ◽  
Average Value ◽  
Nanocomposite Layer ◽  
Phase Shift Angle ◽  
Shift Angle

The paper examined Ti3C2Tx MXene (T—OH, Cl or F), which is prepared by etching a layered ternary carbide Ti3AlC2 (312 MAX-phase) precursor and deposited on a polycaprolactone (PCL) electrospun membrane (MXene-PCL nanocomposite). X-ray Diffraction analysis (XRD) and Scanning Electron Microscopy (SEM) indicates that the obtained material is pure Ti3C2 MXene. SEM of the PCL-MXene composite demonstrate random Ti3C2 distribution over the nanoporous membrane. Results of capacitance, inductance, and phase shift angle studies of the MXene-PCL nanocomposite are presented. It was found that the frequency dependence of the capacitance exhibited a clear sharp minima in the frequency range of 50 Hz to over 104 Hz. The frequency dependence of the inductance shows sharp maxima, the position of which exactly coincides with the position of the minima for the capacitance, which indicates the occurrence of parallel resonances. Current conduction occurs by electron tunneling between nanoparticles. In the frequency range from about 104 Hz to about 105 Hz, there is a broad minimum on the inductance relationship. The position of this minimum coincides exactly with the position of the maximum of the phase shift angle—its amplitude is close to 90°. The real value of the inductance of the nanocomposite layer was determined to be about 1 H. It was found that the average value of the distance over which the electron tunnels was determined with some approximation to be about 5.7 nm and the expected value of the relaxation time to be τM ≈ 3 × 10−5 s.

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