Results 71 to 80 of about 905 (174)

Conductance and density of states from the Kramers-Kronig dispersion relation [PDF]

Physical Review B, 2001
9 pages, 4 ...
openaire   +2 more sources

Optical properties of ternary alloys MgZnO in infrared spectrum

Semiconductor Physics, Quantum Electronics & Optoelectronics, 2018
Properties of thin films of ternary alloys Mg х Zn 1–х O on the optically-anisotropic Al 2 O 3 substrates in the area of “residual rays” of film and substrate are first investigated using the method of infrared spectroscopy and dispersion analysis of ...
E.F. Venger, I.V. Venger, N.O. Korsunska, L.Yu. Melnichuk, O.V. Melnichuk, L.Yu. Khomenkova   +5 more
doaj   +1 more source

Causalité et relations de Kramers-Kronig

Journal de Physique et le Radium, 1961
A l'aide d'exemples empruntés à diverses branches de la physique (élasticité, théorie des oscillations, optique, etc.) l'auteur montre que les relations de Kramers-Kronig (relations entre les parties réelle et imaginaire de l'indice de réfraction, ou d'une grandeur analogue) sont une conséquence du principe de causalité, selon lequel l'effet ne peut se
van Kampen, N.G., Lurçat, François
openaire   +2 more sources

Thermal pseudo-entropy

Journal of High Energy Physics
In this work, we develop a generalisation of the thermal entropy to complex inverse temperatures, which we call the thermal pseudo-entropy. We show that this quantity represents the pseudo-entropy of the transition matrix between Thermofield Double ...
Pawel Caputa, Bowen Chen, Tadashi Takayanagi, Takashi Tsuda   +3 more
doaj   +1 more source

Generalization of the Passivity Criterion for One-Port Devices Presenting Negative Real Part Admittances

IEEE Access, 2017
The physical validation of devices must comply with the principles of causality, passivity, and stability. For linear and time-invariant devices, it can be proved that passivity implies a causal transfer function.
Roberto Batista Sardenberg, Jose M. A. Figueiredo   +1 more
doaj   +1 more source

Active material, optical mode and cavity impact on nanoscale electro-optic modulation performance

Nanophotonics, 2017
Electro-optic modulation is a key function in optical data communication and possible future optical compute engines. The performance of modulators intricately depends on the interaction between the actively modulated material and the propagating ...
Amin Rubab, Suer Can, Ma Zhizhen, Sarpkaya Ibrahim, Khurgin Jacob B., Agarwal Ritesh, Sorger Volker J.   +6 more
doaj   +1 more source

On the Kramers-Kronig relations for interstellar polarization

The Astrophysical Journal, 1975
The difficulties encountered in using the Kramers-Kronig relations to predict the behavior of interstellar polarization are pointed out, while at the same time their value in an interpretive role is acknowledged. Observations of interstellar circular polarization lead to restrictions on the interstellar grain composition, and additional constraints ...
openaire   +1 more source

Electronic energy structure and optical properties of In4CdI6 from ab initio calculations

Condensed Matter Physics
This work presents the ab initio calculations of the electronic energy spectrum of the In4CdI6 compound. The study was conducted within the framework of density functional theory (DFT), using local density approximation (LDA) and general gradient ...
I. V. Semkiv, N. T. Pokladok, F. O. Ivashchyshyn, A. I. Kashuba   +3 more
doaj   +1 more source

Dispersive effects in ultrafast nonlinear phenomena: The case of optical Kerr effect

Physical Review Research
It is a basic principle that an effect cannot come before the cause. Dispersive relations that follow from this fundamental fact have proven to be an indispensable tool in physics and engineering.
Dusan Lorenc, Zhanybek Alpichshev
doaj   +1 more source

Immittance Data Validation by Kramers-Kronig Relations - Derivation and Implications. [PDF]

ChemElectroChem, 2017
Malkow T.
europepmc   +1 more source