Controle e interação de fonons e fotons em fibras opticas de cristal fotonico / Control and interaction of phonons and photons in photonic crystal fibers

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

Techniques that may allow control and tight confinement of photons and phonons in photonic crystal fibers (PCFs) are investigated in this thesis. By means of robust numerical methods to solve Maxwell equations, a new kind of PCF with a tubular core is proposed. Simulations and experimental results show that such structure is able to confine light tighly inside the 100 nm bore, the nonlinear figure of merir for such tiny bore is found to be 10 billion fold larger the focused Gaussian beam counterpart, it is also 100 times larger than the state-of-the-art hollow core photonic band-gap fibers. The guidance mechanism of kagomé structure hollow-core PCF is also investigated, simple models are proposed to explain most of the experimentally observed features and compared to full numerical simulations. In what concerns phonons, both forward and backward Brillouin scattering is investi-gated in PCFs. It is demonstrated how one may suppress both using such fibers. It is also shown the existence of complete band-gaps for in-plane propagation in the PCF cladding. Another set of experiments show that one can perform coherent optical control of the acoustic modes of such fibers, 100-fold amplification or almost complete suppression of GHz oscillations is achieved

ASSUNTO(S)

espalhamento brillouin cristais fotonicos optical fibers fibras oticas photonic crystals phononic crystals brillouin scattering cristais fononicos

ACESSO AO ARTIGO

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