A rigorous multipolar framework for nanoparticles optical properties description : theory and experiments
Using metallic nanoparticles with a threefold symmetry thorough the study, the impact of the symmetry on the nonlinear properties is investigated. Interpretations of polarization-resolved SHG experiments indicate the importance of multipolar resonances, in particular quadrupole and octupole, to expl...
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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2016
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| Online Access: | https://hdl.handle.net/10356/68798 |
| _version_ | 1811682446995881984 |
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| author | Rouxel, Jeremy |
| author2 | Timothee Toury |
| author_facet | Timothee Toury Rouxel, Jeremy |
| author_sort | Rouxel, Jeremy |
| collection | NTU |
| description | Using metallic nanoparticles with a threefold symmetry thorough the study, the impact of the symmetry on the nonlinear properties is investigated. Interpretations of polarization-resolved SHG experiments indicate the importance of multipolar resonances, in particular quadrupole and octupole, to explain the strong values of the nonlinear susceptibilities in such systems. A fully irreducible formalism is then developed to treat extended objects like nanoparticles. In this formalism, the nonlinear response tensor is a discrete set of values easily constrained by symmetries instead of a field. This formalism permits to describe simply linear and nonlinear optical response from nanoparticles. Finally, time-domain experiments are conducted with the aim to connect spatial and spectral properties. These experiments allow to interpret the spectra in terms of eigen-modes. |
| first_indexed | 2024-10-01T03:56:59Z |
| format | Thesis |
| id | ntu-10356/68798 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:56:59Z |
| publishDate | 2016 |
| record_format | dspace |
| spelling | ntu-10356/687982023-07-04T17:27:56Z A rigorous multipolar framework for nanoparticles optical properties description : theory and experiments Rouxel, Jeremy Timothee Toury School of Electrical and Electronic Engineering Tang Dingyuan Tan Howe Siang DRNTU::Engineering::Electrical and electronic engineering Using metallic nanoparticles with a threefold symmetry thorough the study, the impact of the symmetry on the nonlinear properties is investigated. Interpretations of polarization-resolved SHG experiments indicate the importance of multipolar resonances, in particular quadrupole and octupole, to explain the strong values of the nonlinear susceptibilities in such systems. A fully irreducible formalism is then developed to treat extended objects like nanoparticles. In this formalism, the nonlinear response tensor is a discrete set of values easily constrained by symmetries instead of a field. This formalism permits to describe simply linear and nonlinear optical response from nanoparticles. Finally, time-domain experiments are conducted with the aim to connect spatial and spectral properties. These experiments allow to interpret the spectra in terms of eigen-modes. DOCTOR OF PHILOSOPHY (EEE) 2016-06-01T04:33:30Z 2016-06-01T04:33:30Z 2016 Thesis Rouxel, J. (2016). A rigorous multipolar framework for nanoparticles optical properties description : theory and experiments. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/68798 10.32657/10356/68798 en 215 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering Rouxel, Jeremy A rigorous multipolar framework for nanoparticles optical properties description : theory and experiments |
| title | A rigorous multipolar framework for nanoparticles optical properties description : theory and experiments |
| title_full | A rigorous multipolar framework for nanoparticles optical properties description : theory and experiments |
| title_fullStr | A rigorous multipolar framework for nanoparticles optical properties description : theory and experiments |
| title_full_unstemmed | A rigorous multipolar framework for nanoparticles optical properties description : theory and experiments |
| title_short | A rigorous multipolar framework for nanoparticles optical properties description : theory and experiments |
| title_sort | rigorous multipolar framework for nanoparticles optical properties description theory and experiments |
| topic | DRNTU::Engineering::Electrical and electronic engineering |
| url | https://hdl.handle.net/10356/68798 |
| work_keys_str_mv | AT rouxeljeremy arigorousmultipolarframeworkfornanoparticlesopticalpropertiesdescriptiontheoryandexperiments AT rouxeljeremy rigorousmultipolarframeworkfornanoparticlesopticalpropertiesdescriptiontheoryandexperiments |