A5042981162- Microwave Dielectric Ceramics Synthesis
- Ferroelectric and Piezoelectric Materials
- Multiferroics and related materials
- Advanced Fiber Laser Technologies
- Optical Network Technologies
- Photonic Crystal and Fiber Optics
- Electromagnetic wave absorption materials
- Natural Fiber Reinforced Composites
- Advanced Fiber Optic Sensors
- Urban Arborization and Environmental Studies
- Glass properties and applications
- Dielectric properties of ceramics
- Acoustic Wave Resonator Technologies
- Urban Green Space and Health
Universidade Federal do Ceará
2014-2020
Instituto Federal de Educação, Ciência e Tecnologia do Ceará
2019
Federal Center for Technological Education of Minas Gerais
2015
In this work, we present a dielectric study on the Sr3V2O8 (SVO) ceramic matrix in radiofrequency spectrum by using Impedance Spectroscopy (IS). We calcined pure phase SVO through conventional solid-state reaction at 950°C and sintered pellet 1050°C. analyzed X-ray Diffraction, presented single phase. At Scanning Electron Microscopic (SEM) study, micrographs dense with discrete large grains. The IS was performed varying temperature showed that presents giant relative constant (ɛr) not only...
In this work, is studied the effects of addition titanium oxide in ceramic matrix bismuth vanadate per Impedance Spectroscopy (IS) for dielectric and electric properties, numerical simulation applications microwave range. The phase was calcined used to prepare composite where forty-five percent added. Molded pellet shape sintered these samples were characterized by X-ray diffraction (XRD). presented high relative permittivity, negative positive values temperature coefficient capacitance...
Abstract In this work, we present a numerical investigation of the asymmetric double nonlinear coupling photonic crystal fibers in an on‐off switch to obtain fully optical logic gates. Ultra‐short pulses (100 fs) are propagated through device three distinct excitation power regimes, below critical ( P o = 72 kW, where represents device), c 103.5 Power for which switching is 50% both guides. There cases above value, there that below), and 110 kW). The pulse characteristics analyzed as...
We present a numerical investigation of the propagation and switching ultra-short pulses (100 fs) in two-core nonlinear coupler photonic crystal fibers constructed with periodically modulated non-linearity fiber (PMNL-PFC). Our simulations are taking into account different amplitude frequency modulations PMNL-PFC. A for coupling whose length is Lc = 1.8 cm, transmission characteristics, compression factor, crosstalk (Xtalk) extinction ratio (Xratio) levels first order solitons were studied...