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In this paper, we propose a technique named reflection F-scan or RF-scan, that can be used to measure the nonlinear-refractive index n_2 of thin-film semiconductors. In this technique, a p-polarized Gaussian beam is focused using an…

光学 · 物理学 2018-07-11 Juan Serna , Julián Henao , Edgar Rueda , Abdullatif Hamad , Hernando Garcia

The structural interface properties of layered Pt/Ti/SiO2/Si electrodes have been investigated using high-resolution specular and diffuse x-ray reflectivity under grazing angles. Currently this multilayer system represents a technological…

材料科学 · 物理学 2007-05-23 M. Aspelmeyer , U. Klemradt , W. Hartner , H. Bachhofer , G. Schindler

The ground-state polarization of PbTiO3 thin films is studied using a microscopic effective Hamiltonian with parameters obtained from first-principles calculations. Under short-circuit electrical boundary conditions, (001) films with…

材料科学 · 物理学 2009-10-31 Ph. Ghosez , K. M. Rabe

PbZrxTi1-xO3 (PZT) is one of the technologically most important ferroelectric materials. Bulk single-domain single crystals of PZT have never been synthesized for a significant compositional range across the solid-solution phase diagram.…

Stacked layers of metal meshes embedded in a dielectric substrate are routinely used for providing spectral selection at THz frequencies. Recent work has shown that particular geometries allow the refractive index to be tuned to produce…

光学 · 物理学 2012-12-14 Giorgio Savini , Peter A. R. Ade , Jin Zhang

Thin-film based phase plates are meanwhile a widespread tool to enhance the contrast of weak-phase objects in transmission electron microscopy (TEM). The thin film usually consists of amorphous carbon, which suffers from quick degeneration…

材料科学 · 物理学 2016-11-23 M. Dries , S. Hettler , T. Schulze , W. Send , E. Müller , R. Schneider , D. Gerthsen , Y. Luo , K. Samwer

Determination of refractive index of micro-disks of a calcinated ($1100^\circ$C in air) photo-resist SZ2080$^\mathrm{TM}$ was carried out using transmission and reflection spectroscopy. Interference fringes at specific…

In this paper, we present some properties of Lead Zirconate Titanate - Poly Vinylidene Flouride composites. The obtained results indicate that PZT-PVDF fibers involved firms were achieved using electrospining method. In other hand, the…

应用物理 · 物理学 2020-04-16 Do Phuong Anh , Vo Thanh Tung

Thermoreflectance methods by picosecond pulse heating and by nanosecond pulse heating have been developed under the same geometrical configuration as the laser flash method by the National Metrology Institute of JAPAN, AIST. Using these…

材料科学 · 物理学 2007-09-13 T. Baba , K. Ishikawa , T. Yagi , N. Taketoshi

Lead iron niobate (PbFe0.5Nb0.5O3 - PFN) thin films were synthesized by a modified sol-gel route, which offers the advantage of a rapid, simple and non-toxic reaction method. Polycrystalline perovskite-structured PFN thin films without…

材料科学 · 物理学 2023-11-13 L. Imhoff , M. B. Di Marco , S. Barolin , M. A. Rengifo , M. H. Aguirre , M. G. Stachiotti

The oxidation behavior of W-Zr thin-film metallic glasses (TFMGs) with 32, 48 and 61 at.% Zr, prepared by dc magnetron co-sputtering, was comprehensively studied after annealing in synthetic air. The study focuses on the effect of the…

A modified model of metal-semiconductor contacts is applied to analyze the capacitance-voltage and current-voltage characteristics of metal-ferroelectric-metal structures. The ferroelectric polarization is considered as a sheet of surface…

材料科学 · 物理学 2007-05-23 L. Pintiliea , I. Boerasu , M. J. M. Gomes , T. Zhao , R. Ramesh , M. Alexe

Low loss, optical channel waveguides have been successfully produced by high repetition rate, femtosecond laser inscription in a Li-Zn fluoroborate glass (64.9B2O3 + 25Li2O + 10ZnF2 + 0.1Er2O3). High quality waveguides were produced at 500…

材料科学 · 物理学 2015-03-09 Sunil Thomas , T. Toney Fernandez , Javier Solis , P. R. Biju , N. V. Unnikrishnan

We have developed a transient thermoreflectance technique using picosecond pulsed and cw laser to study thermal conductivity and interface conductance in both thin-films and bulk materials. A real time-resolved system observes a thermal…

The electrodynamic properties of BiFeO$_3$ films in the THz region are investigated via time domain spectroscopy. Combining the use of transmission ($\tilde{T}$) and reflection ($\tilde{R}$) measurements under normal incidence, the…

A first-principles-based scheme is developed to simulate properties of (001) PbO-terminated Pb(Zr$_{1-x}$Ti$_{x}$)O$_3$ thin films that are under stress-free and open-circuit boundary conditions. Their low-temperature spontaneous…

材料科学 · 物理学 2009-11-10 Emad Almahmoud , Yulia Navtsenya , Igor Kornev , Huaxiang Fu , L. Bellaiche

In the present work, the Mn doped benzimidazole (BMZ) thin films were prepared by simple chemical bath deposition technique. The material was directly deposited as thin film on glass substrates and the metal concentration in the solution…

材料科学 · 物理学 2014-04-29 P. A. Praveen , R. Ramesh Babu , SP. Prabhakaran , K. Ramamurthi

Thermophotovoltaics (TPVs) have the potential to exhibit higher power conversion efficiencies than traditional photovoltaics (PVs), with a broad range of applicability from waste recovery systems to aerospace solutions. They operate by…

应用物理 · 物理学 2024-10-29 Declan Kopper , Marina S. Leite

Epitaxial strain plays an important role in determining physical properties of perovskite ferroelectric oxide thin films. However, it is very challenging to directly measure properties such as polarization in ultrathin strained films using…

Supplementary Information to arXiv:0810.4466: 1. Characterizations of Pb(Zr_0.2Ti_0.8)O_3 (PZT) films. 2. Substrate preparation before the exfoliation of graphene. 3. The band structure of FLG. 4. Dielectric constant measurements of PZT. 5.…

介观与纳米尺度物理 · 物理学 2009-09-09 X. Hong , A. Posadas , K. Zou , C. H. Ahn , J. Zhu