Nonlinear detection of third harmonic generation (THG) in gold metamaterial

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dc.contributor.authorOnwukwe, Ikenna
dc.contributor.supervisorGordon, Reuven
dc.date.accessioned2016-09-28T20:53:47Z
dc.date.available2016-09-28T20:53:47Z
dc.date.copyright2016en_US
dc.date.issued2016-09-28
dc.degree.departmentDepartment of Electrical and Computer Engineeringen_US
dc.degree.levelMaster of Engineering M.Eng.en_US
dc.description.abstractThis report investigates the optical nonlinearity in thin gold film metasurfaces with an aperture array to realize third harmonic generation (THG). Using Lumerical finite difference time domain (FDTD), nonlinear third harmonic generation was simulated and compared to previous reported works on nonlinear scattering theory. The proposed FDTD nonlinear simulation is computational friendly, simple and provides a good case study when considering the effect of higher excitation power on metamaterials to realise THG, as compared to past simulations carried out that involves importing data from Lumerical FDTD to Matlab to carry out the nonlinear scattering calculation to obtain the final result. The conversion efficiency (the ratio of THG power to the excitation power) of three different aperture arrays was obtained with results showing that the H-shape array would give the highest conversion efficiency of about 0.52 %. The result shows that the FDTD nonlinear simulation approach used agrees with the experimental result and nonlinear scattering theory. This project points towards an effective detection of third harmonic generation (THG) from thin plasmonic metal films using the finite difference time domain (FDTD) method.en_US
dc.description.scholarlevelGraduateen_US
dc.identifier.urihttp://hdl.handle.net/1828/7580
dc.language.isoenen_US
dc.rightsAvailable to the World Wide Weben_US
dc.subjectNonlinear Opticsen_US
dc.subjectThird Harmonic Generationen_US
dc.subjectTHGen_US
dc.subjectMetamaterialen_US
dc.subjectLumericalen_US
dc.subjectFDTDen_US
dc.titleNonlinear detection of third harmonic generation (THG) in gold metamaterialen_US
dc.typeprojecten_US

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