A5048720236- Nonlinear Optical Materials Studies
- Laser Material Processing Techniques
- Gold and Silver Nanoparticles Synthesis and Applications
- Laser-Ablation Synthesis of Nanoparticles
- Laser-Matter Interactions and Applications
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Photonic Crystals and Applications
- Quantum Information and Cryptography
- Glass properties and applications
- Random lasers and scattering media
- Education and Digital Technologies
- Laser Design and Applications
- Neural Networks and Reservoir Computing
- Ocular and Laser Science Research
- Advanced Fiber Optic Sensors
- Nanofabrication and Lithography Techniques
- Optical Coherence Tomography Applications
- Luminescence and Fluorescent Materials
- Chemistry Education and Research
- Healthcare Regulation
- Laser-induced spectroscopy and plasma
- Photochromic and Fluorescence Chemistry
- Advanced Fluorescence Microscopy Techniques
- Quantum Mechanics and Applications
Universidade Federal de São Carlos
2014-2024
Fotonica (Brazil)
2022-2024
Istituto di Fotonica e Nanotecnologie
2023-2024
National Research Council
2024
Center for Physical Sciences and Technology
2023
Universidade Brasil
2023
Departamento de Ciência e Tecnologia
2023
Hospital de Câncer de Barretos
2023
Universidade de São Paulo
2008-2015
Abstract Mutually entangled multi-photon states are at the heart of all-optical quantum technologies. While impressive progresses have been reported in generation such light using free space apparatus, high-fidelity high-rate on-chip entanglement is crucial for future scalability. In this work, we use a bright quantum-dot based single-photon source to demonstrate high fidelity 4-photon Greenberg-Horne-Zeilinger (GHZ) with low-loss reconfigurable glass photonic circuit. We reconstruct density...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation J. M. P. Almeida, H. D. Ferreira, Manzani, Napoli, S. L. Ribeiro, C. R. Mendonça; Metallic nanoparticles grown in the core of femtosecond laser micromachined waveguides. Journal Applied Physics 21 May 2014; 115 (19): 193507. https://doi.org/10.1063/1.4875485 Download citation file: Ris (Zotero) Reference...
A Rhodamine B-doped 3-glycidoxypropyltrimethoxysilane (GPTS)/tetraethyl orthosilicate (TEOS)-derived organic/silica monolithic xerogel with excellent optical properties was prepared and its potential as a random laser host investigated.This hybrid material has non-porous organic/inorganic morphology silica-rich nanoparticles of less than 10 nm in diameter homogeneously dispersed within the matrix.Random emission incoherent feedback, centered at 618 nm, observed from B incorporated into when...
This paper reports the synthesis of Au nanoparticles by 30-fs pulses irradiation a sample containing HAuCl4 and chitosan, biopolymer used as reducing agent stabilizer. We observed that it is multi-photon induced process, with threshold irradiance 3.8 × 10(11) W/cm2 at 790 nm. By transmission electron microscopy we from 8 to 50 nm distinct shapes. Infrared spectroscopy indicated reduction gold consequent production related fs-pulse oxidation hydroxyl carbonyl groups in chitosan.
Controlling microbial growth is crucial for many biomedical, pharmaceutical and food industry applications. In this paper, we used a femtosecond laser to microstructure the surface of chitosan, biocompatible polymer that has been explored applications ranging from antimicrobial action drug delivery. The influence energy density on features produced chitosan was investigated by optical atomic force microscopies. An increase in hydrophilic character attained upon micromachining. Patterned...
Mutually entangled multi-photon states are at the heart of all-optical quantum technologies. While impressive progresses have been reported in generation such light using free space apparatus, high-fidelity high-rate on-chip entanglement is crucial for future scalability. In this work, we use a bright quantum-dot based single-photon source to demonstrate high fidelity 4-photon Greenberg-Horne-Zeilinger (GHZ) with low-loss reconfigurable glass photonic circuit. We reconstruct density matrix...
Abstract In the work reported here we were able to control photobleaching of poly[2‐methoxy‐5‐(2′‐ethyl‐hexyloxy)‐1,4‐phenylene vinylene] (MEH‐PPV), excited by two‐photon absorption, using femtosecond pulse shaping. By applying a cosine‐like spectral phase mask, observe reduction three times in rate, while fluorescence intensity decreases 20%, comparison values obtained with Fourier‐transform‐limited pulse. These results demonstrate an interesting trade‐off between rate and nonlinear...
We have determined the potassium penetration cross-section in chemically tempered glasses by nondestructive nonlinear refraction measurements. The as a function of depth was measure Nonlinear Ellipse Rotation (NER) signal using ultrafast laser pulses (40 fs, 1 kHz, ~2000 GW/cm<sup>2</sup> at 780 nm) from an amplified system. For local NER measurements, we used long distance objective (20x, 1.5 cm WD) which provides relatively good resolution (~5.5 microns). characterized several with...
Este estudo oferece uma análise detalhada de publicações científicas sobre a implementação práticas experimentais no ensino óptica, cobrindo um intervalo temporal 2011 2022. Foram avaliados com rigor artigos publicados em periódicos na área da educação física, incluindo o Caderno Brasileiro Ensino Física, Revista Brasileira Física e Escola. O propósito desta revisão é fornecer visão abrangente atualizada as pesquisas experimentação estruturada categorias temáticas: natureza luz, reflexão,...
Minimizing optical losses in resonant cavities is crucial for improving photonic device performance. This study focuses on the development of a simulation tool to analyze scattering Fabry-Pérot interferometers (FPI), offering precise modeling waveguide dynamics and contributing accurate loss predictions across various platforms. Optical often suffer from due surface roughness material defects. Our approach integrates theoretical models simulations quantify these losses, utilizing FPI as...
Minimizing optical losses in resonant cavities is crucial for improving photonic device performance. This study focuses on the development of a simulation tool to analyze scattering Fabry–Pérot interferometers (FPIs), offering precise modeling waveguide dynamics and contributing accurate loss predictions across various platforms. Optical often suffer from due surface roughness material defects. Our approach integrates theoretical models simulations quantify these losses, utilizing FPI as...
Although sharing common processing stages, bioprinting diverges significantly from conventional 3D printing by utilizing biological products such as cells, demanding precise temperature control to preserve cell viability and function. This article underscores the critical need for meticulous regulation within a printer head ensure optimal printability of biomaterials. The objective this study was implement evaluate Proportional Integral Derivative (PID) controller model develop refine...
With the recently introduced particle interpretation of double-slit experiment [arXiv:2112.05512 (2024)], all interference phenomena can be reinterpreted in terms states that couple (bright) or do not (dark) with detectors. Here, we extend two-mode analysis to multiple modes, particularly mode-locked pulsed lasers, and show collective light modes feature a significantly larger number dark than bright states. By linking time-independent multi-slit experiments (same-mode frequencies)...