Laser pulses
Induction of Localized Hyperthermia by Millisecond Laser Pulses in the Presence of Gold-Gold Sulphide Nanoparticles in a Phantom
... between laser pulses plays a significant role in the quality of temperature ...of laser pulses, the recorded temperature rise in the tumor was significantly more significant than that reported ...
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NANOSCALE STRUCTURES GENERATION WITHIN THE SURFACE LAYER OF METALS WITH SHORT UV LASER PULSES
... effective laser energy deposition depth. It was shown that for short laser pulses (shorter than the characteristic electron-phonon equilibration time) this depth can be approximated as a function of ...
15
Production of Picosecond, Kilojoule, and Petawatt Laser Pulses via Raman Amplification of Nanosecond Pulses
... nanosecond laser pulses to picosecond duration, exploiting the self-similar properties of the ...picosecond pulses of moderate intensity but large total ...
5
Characterization of ultrashort laser pulses: towards a cost-effective solution
... a laser to produce ultrashort pulses, several other conditions must be ...a laser requires a large gain bandwidth, which, taking into ac- count the uncertainty principle [17], determines the ...
121
Seeded QED cascades in counterpropagating laser pulses
... As shown recently by Jirka et al.[18], the spatial struc- ture of the cascading plasma is essential to understand where the pairs are produced. Additionally, the growth rate of the cascade is the important macroscopic ...
9
Amplification and generation of ultra-intense twisted laser pulses via stimulated Raman scattering
... backscattering is a three-wave mode coupling mechanism in which a pump pulse frequency o0 and wavenumber k0, decays into an electrostatic, or Langmuir, plasma wave frequency op and waven[r] ...
7
Laser absorption via quantum electrodynamics cascades in counter propagating laser pulses
... full laser overlap. As the latter is solely a function of laser parameters and the initial target seed, the output radiation could also serve as a possible diagnostic for the laser intensity achieved ...
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Effect of pulse repetition rate and number of pulses in the analysis of polypropylene and high density polyethylene by nanosecond infrared laser induced breakdown spectroscopy
... of pulses, pulse repetition rate and fluence during laser ablation of poly methyl methacrylate (PMMA) were studied using a KrF @ 248 nm excimer laser at pulse repeti- tion rate of 2 and 10 Hz ...of ...
6
Tailoring the spatio-temporal distribution of diffractive focused ultrashort pulses through pulse shaping
... Abstract: Focusing control of ultrashort pulsed beams is an important research topic, due to its impact to subsequent interaction with matter. In this work, we study the propagation near the focus of ultrashort ...
11
Atomic hydrogen under strong soft X-ray pulses
... For Hydrogen, and for the radiant field intensity range con- sidered in ref [11], the EDMA seems quite adequate. This shows also that the non-monotonic behavior of the probabil- ities for 1-photon and 2-photon absorption ...
15
A utilização do laser em Ortodontia.
... Em aplicações extrabucais, deve-se preocupar com a limpeza da pele do paciente, removendo resíduos de maquiagem e cremes que se compor- tam como barreiras físicas para a absorção da luz laser. Deve-se medir a ...
8
Greenray - Tapeçaria Laser
... um laser verde classe IIIb de 532 nm e 150 ...de laser que já pode causar lesões oculares se apontado directamente para os olhos, considerou-se que este risco seria minimizado ao colocar o feixe de ...
13
Scanner tridimensional a laser
... Este trabalho descreve o desenvolvimento de um Scanner Tridimensional `a Laser. Trata-se de uma m ´aquina capaz de digitalizar um objeto f´ısico atrav ´es de imagens capturadas por uma c ˆamera digital, um feixe ...
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Sistema de arrefecimento a laser
... Em 1966, Alfred Kastler (1902 – 1984) [5] foi condecorado com o Prémio Nobel da Física pelo seu trabalho no desenvolvimento do bombardeamento óptico. Na realidade atómica, a grande maioria dos átomos não são átomos de ...
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Os Fundamentos da Luz Laser
... raio laser. Funcionando co- mo fonte de luz de características únicas, o laser possui propriedades es- peciais que o tornam um excelente instrumento de uso científico e tec- ...o laser funciona e ...
6
O PAPEL DO LASER EM ENDODONTIA
... raio Laser de baixa energia por uma fibra ótica para a porção coronária do dente sendo que parte da radiação que chega até á polpa coronária é espalhada pelas células sanguíneas em movimento, sofrendo uma ...
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Revascularização transmiocárdica a laser.
... seus result ados comprovados pela injeção de con- traste nas artérias implantadas, mostrando, em vá- rios pacientes, a sua conexão através dos sinusóides miocárdicos (descr[r] ...
8
Nuclear receptor DHR4 controls the timing of steroid hormone pulses during Drosophila development.
... We previously reported that DHR4 is highly enriched in the cytoplasm of PG cells, even though the protein is nuclear in fat body cells in late L3 larvae [35]. Therefore, it appears that the subcellular localization of ...
19
Supercondutividade em um semicondutor induzida por laser
... centro da Zona de Brilloin contem n eletrons/cm introduzidos por dopagem. p simboliza o momento do elétron proximo de p = 0 e k simboliza o dos elétrons no mínimo absoluto de banda de condução. Nós assumiremos que a ...
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