A5058289353- Luminescence Properties of Advanced Materials
- Glass properties and applications
- Silicon Nanostructures and Photoluminescence
- Chalcogenide Semiconductor Thin Films
- Solid State Laser Technologies
- Heusler alloys: electronic and magnetic properties
- Quantum Dots Synthesis And Properties
- Photonic Crystals and Applications
- ZnO doping and properties
- Solid-state spectroscopy and crystallography
- Nanowire Synthesis and Applications
- Inorganic Fluorides and Related Compounds
- Semiconductor materials and devices
- Boron and Carbon Nanomaterials Research
- Perovskite Materials and Applications
- Laser Material Processing Techniques
- Photonic and Optical Devices
- Semiconductor materials and interfaces
- Diamond and Carbon-based Materials Research
- Gas Sensing Nanomaterials and Sensors
- Copper-based nanomaterials and applications
- Rare-earth and actinide compounds
- Lanthanide and Transition Metal Complexes
- Photochemistry and Electron Transfer Studies
- Metal complexes synthesis and properties
Benemérita Universidad Autónoma de Puebla
2015-2024
Consejo Superior de Investigaciones Científicas
2001-2007
Instituto de Ciencia de Materiales de Madrid
2002-2006
University of Pavia
1992-1993
An investigation into the intrinsic electrical conductivity of perovskite powders MAPbX3, where X represents iodine (I), bromine (Br), or chlorine (Cl), was conducted to explore its impact on their photovoltaic performance. Results revealed that MAPbCl3 demonstrated light absorption ability in ultraviolet and visible regions, while MAPbBr3 showed capacity for at longer wavelengths spectrum. On other hand, MAPbI3 exhibited good wavelengths, indicating absorb near-infrared region. The optical...
NaBi(WO4)2 (NBW), NaBi(MoO4)2 (NBMo) and LiBi(MoO4)2 (LBMo) single crystals grown by the Czochralski technique have been doped up to a praseodymium concentration of in crystal. 10 K polarized optical absorption photoluminescence measurements used determine energy position 32, 39 36 Pr3+ Stark levels NBW, NBMo LBMo crystals, respectively. These were labelled with appropriate irreducible representations corresponding C2 local symmetry an average centre. Single-electron Hamiltonians including...
Pure and Er-doped ([Er]crystal≤2.4 × 1020 cm−3), NaBi(WO4)2 (NBW), NaBi(MoO4)2, LiBi(MoO4)2 crystals have been grown by the Czochralski method. The three crystal hosts similar structural optical properties. noncentrosymmetric space group I4¯ (No. 82) crystallographic structure has established through 300 K single-crystal x-ray neutron (for NBW only) diffraction. Er3+ energy levels were determined experimentally simulated in S4 symmetry a crystal-field analysis. With this background, large...
The spectroscopic properties of ${\mathrm{Ho}}^{3+}$ laser channels in locally disordered tetragonal $\mathrm{Na}\mathrm{Bi}{(\mathrm{W}{\mathrm{O}}_{4})}_{2}$ (NaBiW), $\mathrm{Na}\mathrm{Bi}{(\mathrm{Mo}{\mathrm{O}}_{4})}_{2}$ (NaBiMo), and $\mathrm{Li}\mathrm{Bi}{(\mathrm{Mo}{\mathrm{O}}_{4})}_{2}$ (LiBiMo) single crystals grown by the Czochralski method have been studied $5--300\text{\ensuremath{-}}\mathrm{K}$ temperature range using several holmium concentrations...
For enhancing the omnidirectional photonic bandgap (OPBG), we report fabrication of two different configurations one-dimensional, wavelength scalable dielectric multilayer structures porous silicon, consisting a unit cell formed by varying refractive index multilayers according to envelope Gaussian function. As compared already reported OPBG 88 nm (in complete angular range 0° 89°), an enhancement up 204 (2.3 times) was observed on stacking, six (balanced mirror) with only 8 periods each. An...
We have designed and fabricated one dimensional photonic bandgap (PBG) structures from dielectric multilayers of porous silicon, with a periodic repetition unit cell consisting 21 layers (95%) the refractive index varying according to envelope Gaussian function another layer (5%) fixed index. The can be demonstrate wavelength scalability within visible as well near infrared region. Three different been stacked together enhance width PBG. omnidirectional nature PBG was verified experimentally...
: In this work, we report the experimental results and theoretical analysis of strong localization resonance transmission modes generated by hybrid periodic/quasiperiodic heterostructures (HHs) based on porous silicon. The HHs are formed stacking a quasiperiodic Fibonacci (FN) substructure between two distributed Bragg reflectors (DBRs). FN defines number localized that can be tunable at any given wavelength unfolded when partial periodicity condition is imposed. These structures show...
Currently, the search for inexpensive, non-toxic, and environmentally friendly materials optoelectronic applications has led to an increased interest in one-dimensional ZnO materials. Attributes such as their high surface area, crystalline phase purity, photoexcited response make them attractive light emission, biosensing, energy harvesting applications. However, there is still a need studies that correlate optical structural properties of these materials, so they can be integrated...
Room temperature optical absorption measurements of Nd3+ in NaBi(WO4)2 single crystals grown by the Czochralski method have been used to calculate following Judd-Ofelt intensity parameters Ω2 = 30.9 × 10−20, cm2, Ω4 12.0 10-20 cm2 and Ω6 9.3 10−20 cm2. Using these emission properties this host estimated with particular attention 4F3/2 energy level responsible for stimulated channels. The experimental branching ratios are obtained from photoluminescence agree those calculated using above Ωk...
Abstract Theoretical demonstration and experimental evidence of photon Bloch oscillations Wannier-Stark ladders (WSLs) in dual-periodical (DP) multilayers, based on porous silicon, are presented. An introduction the linear gradient refractive indices DP structure, which is composed by stacking two different periodic substructures N times, resulted appearance WSLs. time-resolved reflection spectrum shows with a period 130 fs. Depending values structural parameters, one can observe WSLs near...