A5090172155- Silicon Nanostructures and Photoluminescence
- Mechanical and Optical Resonators
- Magneto-Optical Properties and Applications
- Magnetic properties of thin films
- Acoustic Wave Resonator Technologies
- Nanowire Synthesis and Applications
- Luminescence and Fluorescent Materials
- Acoustic Wave Phenomena Research
- Luminescence Properties of Advanced Materials
- Magnetic Properties and Applications
- Photonic Crystals and Applications
- Semiconductor materials and devices
- Nonlinear Optical Materials Studies
- Photorefractive and Nonlinear Optics
- Gold and Silver Nanoparticles Synthesis and Applications
- Nonlinear Photonic Systems
- Nanoplatforms for cancer theranostics
- Nanocluster Synthesis and Applications
- Photochemistry and Electron Transfer Studies
- Wind and Air Flow Studies
- Optical and Acousto-Optic Technologies
- Radiation Detection and Scintillator Technologies
- Spectroscopy and Quantum Chemical Studies
- Seismic Waves and Analysis
- Multiferroics and related materials
Benemérita Universidad Autónoma de Puebla
2015-2025
Terra
2025
Universidad Nacional Autónoma de México
2016-2017
ITMO University
2016
Saint Petersburg State Electrotechnical University
2016
Universidad Autónoma del Estado de Morelos
2015
This study investigates the luminescent dynamics of poly(methyl methacrylate) (PMMA) doped with rare earth ions, focusing on donor and acceptor ions. The ions feature two excited energy levels, enabling upconversion through transfer (ET) Additionally, this examines how is affected by enhanced electric field achieved plasmonic resonance metallic nanoparticles (NPs). motivation behind lies in necessity to enhance luminescence properties materials for advanced applications bioimaging optical...
Abstract We present a theoretical investigation of the Goös–Hanchen shift (GHS) experienced by acoustic and optical vibrational modes reflected transmitted from surfaces semiconductor thin film sandwiched between two semi-infinite media. Our study focuses on impact incident angle GHS, considering coupling longitudinal transverse modes. For vibrations, our findings reveal that GHS can reach magnitudes up to seven times larger than thickness 20 wavelength. Besides, it is shown this significant...
We report the theoretical calculations and experimental demonstration of acoustic Bloch oscillations Wannier-Stark ladders in linear tilted multilayer structures based on porous silicon. The considered consist layers with constant porosity alternated by a gradient parameter η=1/vL2 along growth direction order to tilt band gap. purpose this is mimic electronic miniband structure superlattice semiconductor under an external electric field. In way, equidistant modes are formed they were...
The formation and evolution of spin wave band gaps in the transmission spectrum a magnonic crystal have been studied. A time space resolved magneto inductive probing system has used to map propagation geometrically structured yttrium iron garnet film. Experiments carried out using (1) chemically etched supporting magnetostatic surface waves, (2) short microwave pulsed excitation (3) direct detection movable probe connected synchronized fast oscilloscope. results show that periodic structure...
The propagation of longitudinal acoustic waves in multilayer structures based on porous silicon and the experimental measurement transmission for gigahertz range are reported studied theoretically. considered exhibit band gaps spectrum these localized modes inside gap, coming from defect layers introduced periodic systems. frequency at which resonances appear can be tuned by changing porosity and/or thickness layer.
We report the experimental observation of Wannier-Stark ladders and Bloch oscillations for acoustic waves in porous silicon structures. designed fabricated a structure with an band gap centered around 1 GHz. introduced linear gradient acoustical parameter η=1/vL2 to obtain ladder we observed it from transmission measurements. The behavior is excellent agreement transfer matrix calculations.
A straightforward scattering matrix method derived from the Hybrid is proposed to study band gaps of elastic waves propagating along an arbitrary direction in one-dimensional ordered and disordered phononic crystals. We show that this a suitable alternative methodology overcome numerical degradation manifested by standard transfer even calculations where nonlossy medium and/or relatively low angles incidence are involved. Using wave equation Sturm-Liouville form, we analytically can use...
In this article, we describe a magnonic crystal formed by magnetite nanoparticles. The periodic strip-like structure of the nanoparticles was fabricated on surface thin yttrium iron garnet single-crystal film grown gallium–gadolinium substrate via dip-coating techniques. It shown that such induces formation bandgaps in transmission spectra magnetostatic spin-waves (MSSW). simulated transfer matrix method. Spin-wave detection has been carried out using pair microwave antennas and vector...
The longwave phenomenological model is used to make simple and precise calculations of various physical quantities such as the vibrational energy density, energy, relative mechanical displacement, one-dimensional stress tensor a porous silicon distributed Bragg reflector. From general principles invariance under time reversal, space reflection, conservation density flux, equivalence tunneling times for both transmission reflection demonstrated. Here, we study acoustic phonon packets through...
Amplitude, frequency, and time domain characteristics have been mapped for short spin wave pulses inside a magnonic crystal. A space- time-resolved magnetoinductive probing system has used to detail the spectral, propagation, evolution in geometrically structured yttrium iron garnet film. Experiments performed using magnetostatic surface waves excited chemically-etched crystal, ultrafast pulsed excitation of waves, direct detection scannable probe connected synchronized fast oscilloscope....
In this article, we show theoretically and experimentally the formation of spin-waves band gaps in a magnonic crystal that was implemented by deposition periodic micro-structured strips magnetite nanoparticles. A theoretical model describing spectra transmitted bandgaps is proposed. This achieved using simple based on microwave transmission line theory considering presence nanoparticles surface. Such equally spaced surface an yttrium iron garnet thin film has been measured. The are deposited...
Multilayer rugate-like structures based on porous silicon with incorporated active ions are investigated. consist different sinusoidal refractive index profiles designed to show the greatest amplification of electric field at a wavelength 1 µm. We that it is possible increase localization by optimizing design parameters, and thereby directly enhances photoluminescence ions. The luminescent properties in calculated from model Förster Resonance Energy Transfer (FRET) theory, which considers...