Multiphoton Ionization
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Produção de nanopartículas de Au induzida por pulsos laser de femtossegundos formatados / Gold nanoparticles production induced by shaped femtosecond laser pulses
Neste trabalho investigamos a dinâmica de formação de nanopartículas de Au por pulsos de femtossegundos formatados (800 nm, 30 fs, 1 kHz e 2 mJ), induzida pela ionização da molécula de quitosana. Inicialmente desenvolvemos um sistema de formatação de pulsos ultracurtos que faz uso de um modulador espacial de luz, constituído por um arranjo linear d
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/10/2011
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2. Fotoionização atomica em campos de laser intenso
This Thesis focus on a non-perturbative approach to describe a hydrogenic atom behavior in an intense laser field and how it affects the atomic multiphoton ionization rate. The atom in the intense field is described under a formulation which explores an unitary transformation (space translation) to obtain the Lima &Miranda dressed atom effective binding pote
Publicado em: 1985
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3. Considerações sobre a ruptura dieletrica em gases sob ação de um campo de laser intenso
Gas breakdown, steady-state maintenance and continuous generation of low-temperature plasma and propagation of the plasma fronts are important subjects of past and current research on laser induced gas discharges. This Thesis is concerned with some aspects of the laser induced dielectric breakdown in a gas. We have specifically addressed the question of the
Publicado em: 1985
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4. Optics at critical intensity: Applications to nanomorphing
Laser-induced optical breakdown by femtosecond pulses is extraordinarily precise when the energy is near threshold. Despite numerous applications, the basis for this deterministic nature has not been determined. We present experiments that shed light on the basic mechanisms of light–matter interactions in this regime, which we term “optics at critical in
National Academy of Sciences.
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5. Even-odd alternation in mass spectrum of thymine and uracil clusters: Evidence of intracluster photodimerization
Multiphoton ionization of thymine and uracil clusters generated by a supersonic molecular beam gave rise to a remarkable alternation of mass spectral intensities between even- and odd-numbered clusters. Such alternation was observed in clusters of up to 30 molecules. Excitation to the two lowest electronically excited states seemed to be a strong prereq
The National Academy of Sciences.
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6. Logic gates using high Rydberg states
Connected logic gates can be operated on the levels of one molecule by making use of the special properties of high Rydberg states. Explicit experimental results for the NO molecule are provided as an example. A number of other options, including that of several gates concatenated so as to operate as a full adder, are discussed. Specific properties of h
The National Academy of Sciences.