Banca de DEFESA: DAVI FRANCO RÊGO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : DAVI FRANCO RÊGO
DATA : 06/12/2019
HORA: 14:00
LOCAL: Salvador - BA
TÍTULO:

DESIGN AND ANALYSIS OF PLASMONICS AND METAMATERIALS DEVICES

PALAVRAS-CHAVES:

1. Metamaterial 2. Plasmonic Devices. 3. Asymmetric metasurfaces. 4. Optical Nanodevices

PÁGINAS: 109
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Elétrica
SUBÁREA: Telecomunicações
ESPECIALIDADE: Teoria Eletromagnetica, Microondas, Propagação de Ondas, Antenas
RESUMO:

The development of plasmonic metamaterials surfaces has expanded the possibilities
of manipulating electromagnetic waves in an unprecedented way. A new field of study was
opened for the research of applications and it has been possible by the fundamental
revolution caused by the discovery of the properties of plasmonic metamaterials. This work
presents absorptive surfaces based on this technology, in addition to the proposing of new
devices developed with the aid of iterative searches based on genetic algorithms. Optical
broadband filters with absorption coefficient near the unit are proposed. A device with
asymmetric absorption was demonstrated, built from the superposition of layers of
dielectrics and metals with an absorption asymmetry ratio above 28 and a contrast ratio close
to the unit. In this work, devices capable of modifying their spectral behavior from
controlling the state of the molecular arrangement of structures based on phase change
materials are proposed. These devices were designed, simulated, manufactured and
characterized experimentally and the simulated and experimental results showed a good
agreement. The automated search method was also used in the design of a coupling grating
for an integrated waveguide of silicon nitride, with coupling efficiency of up to 90%. We also
proposed a demultiplexing coupling grating capable of directing a beam from a fiber to two
different waveguides with an efficiency of 25% at λ = 1550nm and 27% efficiency at λ =
2000nm.

MEMBROS DA BANCA:
Interno - 1546333 - KARCIUS DAY ROSARIO ASSIS
Interno - 1521970 - VITALY FELIX RODRIGUEZ ESQUERRE
Externo à Instituição - COSME EUSTAQUI RUBIO MERCEDES - UEMS
Externo à Instituição - GILLIARD NARDEL MALHEIROS SILVEIRA - UNESP
Externo à Instituição - RODRIGO GUSMÃO CAVALCANTE - IFBA