A5058605628- Nonlinear Optical Materials Studies
- Nonlinear Optical Materials Research
- Laser-Matter Interactions and Applications
- Spectroscopy and Quantum Chemical Studies
- Photochemistry and Electron Transfer Studies
- Photorefractive and Nonlinear Optics
- Phase-change materials and chalcogenides
- Advanced Frequency and Time Standards
- Optical Systems and Laser Technology
- Protein Interaction Studies and Fluorescence Analysis
- Force Microscopy Techniques and Applications
- Atomic and Subatomic Physics Research
- Spectroscopy Techniques in Biomedical and Chemical Research
- Spectroscopy and Laser Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Photoreceptor and optogenetics research
- Liquid Crystal Research Advancements
- Advanced Fluorescence Microscopy Techniques
- Molecular spectroscopy and chirality
- Optical Coatings and Gratings
- Photonic Crystals and Applications
- Free Radicals and Antioxidants
- Photonic and Optical Devices
- Advanced Measurement and Metrology Techniques
- Educational Games and Gamification
Instituto Federal de Educação, Ciência e Tecnologia do Pará
2022
Universidade Federal do Ceará
2022
Universidade de São Paulo
2014-2018
Universidade Federal de São Carlos
2014-2016
Bellingham Technical College
2015
Instituto de Ciencia de Materiales de Madrid
2000
We report on the accurate measurement of nonlinear ellipse rotation (NER) by means a phase-sensitive method employing dual-phase lock-in. The magnitudes and signs pure refractive electronic nonlinearities silica BK7 were determined with this new using 150 femtosecond (fs) laser pulses at 775 nm. Experimental theoretical analyses NER signal carried out results compared to those obtained Z-scan technique.
We investigated the magnitude and origin of nonlinear refraction in several solvents with ellipse rotation measurements as a function pulse duration range from 60fs to 2ps. Due presence non-instantaneous nuclear contributions concurrently nearly instantaneous electronic nonlinearity, present effective refractive nonlinearities that depend on duration. By proposing an empirical model where nonlinearity grows exponentially normalized response time, we could separate fast isotropic slow...
Nonlinear optical effects have been widely explored for microscopy due to the possibility of three-dimension (3D) image acquisition. Harmonic generation and nonlinear absorption, instance, were used this purpose. Each effect has its own characteristic, complexity, type contrast, advantage disadvantage, etc. Recently, we developed a new simple sensitive method measuring ellipse rotation (NER) using dual-phase lock-in amplifier, which could be successfully applied local nonlinearity...
The measurements of nonlinear ellipse rotation (NER) can be very helpful to determine the magnitude, as well, origin nonlinearity. As it is known, NER related particular component third-order susceptibility which different from other effects. In this way, here we propose a new method improve measuring precision angle using dual phase lock-in. We also did well known Z-scan measurement provides refractive index give support our results. Using these two measurements, could study several...
We report on self-referenced third-order nonlinear optical properties determination method by measuring the ellipse rotation (NER) angles. Here, using a dual-phase lock-in, we were able to measure precisely NER glasses and liquids.
We report studies of orientational nonlinearities influence on THG at interfaces a cuvette filled with organic solvents by means pulse duration. Electronic and are affected distinctly depending
We have identified strong influence of pulse width in the nonlinear refractive index, n2, gases due to contribution noninstantaneous response. Using 50fs-1.2ps pulses, n2 values were determined by ellipse rotation measurements.
We investigate the contribution of noninstantaneous response time organic solvents nonlinearities by measuring nonlinear refractive indices with ellipse rotation method as a function pulse width, which was spanned from 50fs to ~700fs.
There are materials which their nonlinear refractive index (n <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> ) have contributions from fast isotropic and slow reorientational effects. Due to the presence of noninstantaneous effect, magnitude effective xmlns:xlink="http://www.w3.org/1999/xlink">2, eff</inf> depends pulse width (τ). Here, we propose measured n xmlns:xlink="http://www.w3.org/1999/xlink">2eff</inf> several organic solvents...
Cursos de ensino médio integrados apresentam em seus componentes curriculares disciplinas aplicadas Física, que objetivam introduzir conceitos fundamentais devendo trabalhar tanto a teoria como prática correspondente. A conjugação dessas abordagens distintas muitas vezes implica uma delas ser parcialmente negligenciada. parte é sofre com falta tempo, somada à estrutura laboratorial recorrente nas instituições no Brasil. Ferramentas virtuais simulam laboratórios têm potencial para conjugadas...