Infrared nanoimaging and nanospectroscopy in liquid environment
- Autores: Divya Virmani
- Directores de la Tesis: Rainer Hillenbrand (dir. tes.), Jose María Pitarque de la Torre (tut. tes.)
- Lectura: En la Universidad del País Vasco - Euskal Herriko Unibertsitatea ( España ) en 2024
- Idioma: inglés
- Programa de doctorado: Programa de Doctorado en Física de Nanoestructuras y Materiales Avanzados/Physics of Nanostructures and Advanced Materials por la Universidad del País Vasco/Euskal Herriko Unibertsitatea
- Calificación: Sobresaliente
- Materias:
- Enlaces
- Tesis en acceso abierto en: ADDI
- Resumen
Scattering-type scanning near-field optical microscopy (s-SNOM) and nanoscale resolved Fourier transform infrared microscopy (nano-FTIR) are powerful, label-free techniques for nanoscale-resolved characterization of various materials. There exists an increasing need for nanoscale-resolved infrared imaging and spectroscopy in liquid environments, particularly for various bio(chemical) and polaritonic sample systems. In this thesis, two instrumental approaches are developed and implemented to enable mid-IR s-SNOM-based nanoimaging and nano-FTIR spectroscopy in liquid environments. The focus of this work is on nanoimaging and nanospectroscopy of plasmon resonances in metal nanostructures and ultra-confined phonon polaritons on h-BN flakes. Polaritons are well known for their ability to enhance light-matter interactions and play a crucial role in highly sensitive optical analysis of (bio)chemical substances and processes. This work establishes a foundation for future in-situ s-SNOM studies of antenna-enhanced molecular spectroscopy, strong coupling between polaritons and molecular vibrations, and chemical reactions at the bare or functionalized surfaces of polaritonic materials.
