Results 61 to 70 of about 809 (132)

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

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

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

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

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

Electrons phase reconstruction using Kramers-Kronig relations [PDF]

BIO Web of Conferences
Yin Yang, He Wenhao, Zheng Changlin
doaj   +1 more source

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

ChemElectroChem, 2017
Malkow T.
europepmc   +1 more source

Multifunctional analysis of CaX2Bi2O9 (X = Nb, V, Ta, and Pa) compound by first principles framework for photovoltaic applications

AIP Advances
A detailed theoretical study employing the first-principles framework of density functional theory has been carried out to explore the structural and multifunctional properties, including electronic, optical, dielectric, and mechanical properties, of ...
Nawishta Jabeen, Ahmad Hussain, Ameer Hamza, Omer Musa, Nagappan Beemkumar, Jajneswar Nanda   +5 more
doaj   +1 more source