ETD system

Electronic theses and dissertations repository

 

Tesi etd-02102020-114541


Thesis type
Tesi di dottorato di ricerca
Author
GABBANI, ALESSIO
URN
etd-02102020-114541
Title
Exploring magneto-optical properties in plasmonic and magnetoplasmonic nanostructures
Settore scientifico disciplinare
CHIM/03
Corso di studi
SCIENZE CHIMICHE E DEI MATERIALI
Supervisors
tutor Prof. Pineider, Francesco
Parole chiave
  • magnetic circular dichroism spectroscopy
  • magneto-optics
  • active plasmonics
  • inorganic nanoparticles
  • magnetoplasmonics
Data inizio appello
20/02/2020;
Consultabilità
Parziale
Data di rilascio
20/02/2023
Riassunto analitico
Plasmonic nanostructures are intriguing materials for applications in optical sensing and enhanced spectroscopies. To further improve their performances, one of the most appealing strategies is the active modulation of the plasmonic response by means of an external magnetic field, i.e.magnetoplasmonics. To reach such a controlled magnetic modulation, the accurate design of the nanostructures in terms of architecture and material choice is crucial. Indeed, conventional plasmonic materials typically display poor magnetic field response, while the insertion of magnetic materials usually damps the plasmonic resonance in hybrid systems.
In this thesis, Magnetic Circular Dichroism is employed as a characterization tool to assess the magnitude of the magnetic modulation of the plasmonic resonance in properly designed nanostructures, and some of the key aspects involved in the enhancement of the modulation are highlighted. Colloidal chemistry approaches are almost exclusively exploited to prepare such nanostructures. The investigation covers a wide range of materials and architectures, from purely plasmonic nanomaterials (noble metals and degenerately doped semiconductors) to complex hybrid nanostructures with different degree of interaction between the plasmonic and the magnetic material (mainly core@shell and nanoalloys).
File