Banca de DEFESA: GABRIEL SOUZA BRILHANTE DE ARAUJO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : GABRIEL SOUZA BRILHANTE DE ARAUJO
DATA : 28/02/2023
HORA: 10:00
LOCAL: uern
TÍTULO:

Goos-Hänchen Shift Associated Wwith Guided Wave Excitation in a Silicon Slab

PALAVRAS-CHAVES:

Goos-Hänchen, Guided Waves, Terahertz

PÁGINAS: 52
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Física
SUBÁREA: Física da Matéria Condensada
ESPECIALIDADE: Prop. Óticas e Espectrosc. da Mat. Condens; Outras Inter. da Mat. com Rad. e Part.
RESUMO:

When a beam of electromagnetic radiation is incident on a surface, the reflected beam may undergo a lateral displacement. This effect is not predicted by geometric optics and is known as the Goos-Hänchen effect, which, in the case of the present work, is due to guided wave excitation, in which the displacement will be dependent on the frequency of the incident radiation. The configuration studied consists of a Si prism, with the angle of incidence within the prism greater than the critical angle for total internal reflection, an air layer and a Si slab with defined thickness. Computer simulations were performed with this geometry and interesting results were obtained. The first one is that, for the frequency band used (255-295 GHz), from calculations assuming a wide beam, we observed that the beam displacement presents different values, presenting maximum and minimum for certain established frequencies coresponding to guided wave excitations. Apart from this result we consider how, for a Gaussian beam of finite width, the intensities of the incident and reflected beam present a displacement. We examine how, when we modify parameters such as the beam width and the thickness of the air layer between the prism and the Si plate, the displacements are greater for wider beams and a larger prism-slab distance.

MEMBROS DA BANCA:
Presidente - 3300 - THOMAS DUMELOW
Interno - 7958 - JOSÉ ALZAMIR PEREIRA DA COSTA
Externo à Instituição - FRANCISCO FRANCINÉ MAIA JÚNIOR