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3121
Desenvolvimento de um Sistema de Medição Baseado em Espectroscopia Resolvida no Tempo e no Espectro da Energia: Integração de um Espectrômetro Triplo a um Motor de Micropassos
Published 2022-07-01“…The first is a server application that, upon receiving a connection from the client application (second): 1) acquires and saves a spectrum referring to the emission of a sample in which the laser pulses are incident; 2) calculates the integrated intensity of this spectrum by means of a curve fit; 3) plot the spectrum acquired and the adjustment performed on a graph; 4) sends the integrated intensity to the connected client and 5) returns to standby by new connections. …”
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3122
Post-processing of antiresonant hollow-core fibers and its applications
Published 2023“…On the other hand, as a platform for the interaction between light and matter, the laser pulses can be guided over long distances within the hollow fiber core of micrometer magnitude, breaking the limitation of diffraction limit in free-space transmission and greatly enhancing the interaction between light and matter. …”
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Thesis-Doctor of Philosophy -
3123
Dirofilarae identification with MALDI-TOF MS database
Published 2025-03-01“…To obtain a single mass spectrum, 40 laser pulses (frequency 60 Hz) were used; the analyzed mass/charge range was from 2000 to 20,000 kDa. …”
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3124
Crystalline Flat Surface Recovered by High-Temperature Annealing after Laser Ablation
Published 2023-05-01“…Ultra-short laser pulses (1030 nm/230 fs) were used to laser ablate the surface of crystalline sapphire (Al<sub>2</sub>O<sub>3</sub>) at high intensity per pulse 20–200 TW/cm<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mn>2</mn></msup></semantics></math></inline-formula>/pulse. …”
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3125
Prospects of photon counting lidar for savanna ecosystem structural studies
Published 2014-11-01“…We used data from the Multiple Altimeter Beam Experimental Lidar (MABEL), an airborne photon counting lidar sensor developed by NASA Goddard. MABEL fires laser pulses in the green (532 nm) and near infrared (1064 nm) bands at a nominal repetition rate of 10 kHz and records the travel time of individual photons that are reflected back to the sensor. …”
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3126
Linearly Polarized <i>γ</i> Photon Generation from Unpolarized Electron Bunch Interacting with Laser
Published 2025-01-01“…This study proposes a scheme for generating linearly polarized <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>γ</mi></semantics></math></inline-formula> photons from the interaction of a GeV-level unpolarized electron bunch with currently available laser pulses at moderate intensity. We investigate the scheme by considering the electron bunch of various initial energies and various laser intensities using two-dimensional particle-in-cell simulation and the theory of quantum electrodynamics. …”
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3127
Nanoscale-Resistive Switching in Forming-Free Zinc Oxide Memristive Structures
Published 2022-01-01“…An increase in the number of laser pulses from 1000 to 5000 was shown to lead to an increase in the thickness of the nanocrystalline ZnO film from 7.2 ± 2.5 nm to 53.6 ± 18.3 nm. …”
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3128
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3129
Nanomedicine: Treatment of Chronic Disease Using Gold Nano Thermo Robot (GNTR) Empowered With Nanotechnology Approaches
Published 2024-01-01“…To generate hyperthermia, which has been irradiated by laser pulses to propose GNTR, a Coulomb explosion took place, and a huge amount of dispersed hyperthermia waves were produced. …”
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3130
Ultraviolet laser induced periodic surface structures positively influence osteogenic activity on titanium alloys
Published 2024-10-01“…In this preclinical in vitro study, laser pulses with a wavelength in the ultraviolet (UV) spectrum were applied for the generation of LIPSS to positively influence formation of extracellular matrix by primary human Osteoblasts (hOBs) and to reduce microbial biofilm formation in vitro.MethodsLaser machining was employed for generating UV-LIPSS on sample disks made of Ti6Al4V and Ti6Al7Nb alloys. …”
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3131
Gene expression changes of angiogenesis factors during basal skin cancer laser destruction
Published 2023-12-01“…An increased expression of the matrix metalloproteinase MMP9 and the tachykinin precursor TAC1 genes were revealed in skin biopsy samples of the superficial form of basal cell skin cancer during laser pulsed therapy. The expression of tumor necrosis factor TNF, epidermal growth factor receptor EGFR, fibroblast growth factor FGF2 genes increases to a lesser extent. …”
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3132
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3133
Ultrafast charge carrier and coherent phonon dynamics study of semiconductor nanostructures using femtosecond transient absorption spectroscopy
Published 2017“…To investigate coherent electronic motion in low-dimensional semiconductors, we employ transient absorption spectroscopy with few-cycle laser pulses. The broadband spectra overlap with the two lowest-lying excitonic states of colloidal CdSe quantum dots (QDs), thus preparing a superposition of 1S_e 1S_h and 1S_e 2S_h states. …”
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Thesis -
3134
A functional characterisation of retrorubral field dopaminergic neurons
Published 2021“…Anaesthetised in vivo electrophysiological validation experiments demonstrated that ArchT-transduced dopaminergic neurons reliably pause their firing in response to brief (250 ms), physiologically-relevant yellow laser pulses. In freely-moving mice, ‘positive control’ experiments in which VTA dopaminergic neurons were briefly (250 ms) paused did not induce place aversion in either a bias conditioned place preference test or real-time place preference test.…”
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3135
Investigations into femtosecond laser hybrid manufacturing for 3D power sources
Published 2021“…Improvements in femtosecond laser stability are first achieved through the in-line monitoring of femtosecond laser pulses, such as pulse repetition rate, fluence and number of pulses during fabrication, reducing the impact of laser fluctuations and drift on fsDLW and fsLIL. …”
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Thesis-Doctor of Philosophy -
3136
Gap-Free Tuning of Second and Third Harmonic Generation in Mechanochemically Synthesized Nanocrystalline LiNb<sub>1−<i>x</i></sub>Ta<sub><i>x</i></sub>O<sub>3</sub> (0 ≤ <i>x</i> ≤...
Published 2024-02-01“…For this purpose, harmonic generation is studied in nanosized crystallites of mechanochemically synthesized LNT using nonlinear diffuse reflectometry with wavelength-tunable fundamental femtosecond laser pulses from 1200 nm to 2000 nm. As a result, a gap-free harmonic emission is validated that accords with the theoretically expected energy relations, dependencies on intensity and wavelength, as well as spectral bandwidths for harmonic generation. …”
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3137
Bound exciton engineering approach for tuning the thermal lensing phenomenon in anatase TiO2: Gd nanosystems
Published 2024-12-01“…We report a comprehensive investigation of the third-order nonlinear interaction of femtosecond laser pulses with nanostructured anatase TiO2 doped with varying concentrations of gadolinium impurities. …”
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3138
Comparative Additional Factor for Diffraction Loss On (TEM01) Mode from That of (TEM00) Mode
Published 2022-04-01“…Vacuum birefringence in the head-on collision of x-ray free-electron laser and optical high-intensity laser pulses. Physical Review D, 98, 056010. KOGELNIK, H. & LI, T. 1966. …”
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3139
Physical and chemical characterization of the surface and removal process of silicon carbide ceramics by femtosecond laser processing
Published 2024-08-01“…This paper analyzes the microstructure of the surface of silicon carbide ceramics processed by femtosecond laser pulses and its evolution law. It reveals the material removal process by examining the changes in chemical components in the ablation area, further improving the femtosecond laser processing mechanism of silicon carbide ceramics from the perspective of changes in material's physicochemical properties. …”
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3140
Investigation into surface texturing by magnetic field assisted laser-produced plasma
Published 2013“…We used low repetition rate (1 kHz) of femtosecond laser pulses with negligible thermal accumulation and succeeded in non-ablative direct writing of silicon surface. …”
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Thesis