Plasmonic nanostructures and metamaterials for nanoscale light-matter interaction

The objective of this dissertation is to study the light-matter interaction phenamena at nanoscale in the presence of plasmonic nanostructures and metamaterials. Using the principles of nano-optics, a range of plasmonic nanodevices are developped for molecular sensing, nonlinear optics and surface plasmon lasing. This theoretical and experimental investigation is further extended by studying the effect of plasmon tunneling in sub-nanometer distances and light-matter interaction in atomically thin semiconductors adjacent to plasmonic nanostructures. More specifically, chemically synthesized plasmonic nanocube dimers and chains are studied for ultrasensitive molecular sensing using the wavelength shift of their localized surface plasmon resonance. The effect of interparticle spacing and relative orientation of the nanocubes in the nanocube chains has also been analyzed. The band-edge lattice plasmon waves in plasmonic nanoantenna arrays have been studied and utilized for surface-enhanced Raman spectroscopy. Superchiral spectroscopy at the molecular level is demonstrated using a novel three-dimensional chiral metamaterial. Furthermore, surface-enhanced second harmonic generation in coupled plasmonic nanostructures that support sharp Fano-type resonance features, is studied theoretically and experimentally. Finally, a plasmonic nanolaser incorporating a plasmonic nanocavity and a monolayer of transition metal dichalcogenide is developed.

Level thesis:degree_level

Doctoral

Department dc:contributor.department

Electrical and Computer Engineering

Grantor dc:publisher

Georgia Institute of Technology

Year dc:date.issued

2018

Author dc:creator

• Shams Mousavi, Seyed Hamed

Advisor dc:contributor.advisor

• Adibi, Ali

Committee members dc:contributor.committeemember

• El-Sayed, Mostafa A.
• Cai, Wenshan
• Klein, Benjamin
• Jiang, Zhigang
• Harutyunyan, Hayk

• Plasmonics
• Photonics
• Metamaterials
• Nonlinear optics
• Biosensing
• Lasing

Language dc:language.iso

en_US

Handle dc:identifier.uri

http://hdl.handle.net/1853/62184

OAI identifier oai:identifier

oai:repository.gatech.edu:1853/62184