Results 71 to 80 of about 1,782,899 (173)

Beyond the weak-scattering limit: accurate Kramers–Kronig phase imaging of high-contrast reflective surfaces via pupil modulation

JPhys Photonics
Here, we present a pupil-modulation method that selectively attenuates the scattered field from an object, enabling quantitatively accurate phase retrieval based on spatial-domain Kramers–Kronig (KK) relations.
Hyeonseo Na, Seungmin Lee, Chao Tan, Doeon Lee, Mooseok Jang   +4 more
doaj   +1 more source

Study of Optical Properties of NiO and Ni0.92Zn0.08O Thin Films Prepared by Pulsed Laser Deposition via Kramers–Kronig Analysis

Tikrit Journal of Pure Science
NiO and Ni0.92​Zn0.08​O thin films were deposited onto glass substrates using pulsed laser deposition in vacuum. The optical properties were investigated using the Kramers-Kronig relations, with the phase shift angle computed numerically in MATLAB.
Mustafa F. Hamad , Najat A. Dahham
doaj   +1 more source

On response spectra and Kramers-Kronig relations in superposition rheometry

The Physics of Fluids, 2019
In a recent paper, we derived expressions for determining the rate-dependent response spectra directly from parallel superposition rheometry data for the case of a certain Lodge-type integral constitutive model.
D. Curtis, A. R. Davies
semanticscholar   +1 more source

Coupling-enhanced dual ITO layer electro-absorption modulator in silicon photonics

Nanophotonics, 2019
Electro-optic signal modulation provides a key functionality in modern technology and information networks. Photonic integration has not only enabled miniaturizing photonic components, but also provided performance improvements due to co-design ...
Tahersima Mohammad H., Ma Zhizhen, Gui Yaliang, Sun Shuai, Wang Hao, Amin Rubab, Dalir Hamed, Chen Ray, Miscuglio Mario, Sorger Volker J.   +9 more
doaj   +1 more source

Lattice dynamics and phonon characteristics of complex perovskite microwave ceramics

IET Nanodielectrics, 2019
Complex perovskite microwave dielectric ceramics (MWDCs) of [inline-formula]-type (A = Ba, Sr,…; B′ = Mg, Zn,…; B″ = Nb, Ta), which exhibit excellent dielectric properties, have currently been widely used in microwave and millimetre wave devices ...
Feng Shi, He-Lei Dong, He-Lei Dong, Di Zhou, Chun-Hai Wang, Qiu-Lin Tan, Ji-Jun Xiong, Qing Wang   +7 more
doaj   +1 more source

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

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

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