Sample interview questions: Can you explain the concept of plasmonics and its applications in solid-state physics?
Sample answer:
Concept of Plasmonics
Plasmonics involves the study of surface plasmons, which are coherent oscillations of free electrons at interfaces between metals and dielectrics. When light interacts with surface plasmons, it can produce highly concentrated electromagnetic fields known as localized surface plasmon resonances (LSPRs).
Applications in Solid-State Physics
Plasmonics finds wide-ranging applications in solid-state physics, including:
- Enhanced Spectroscopy: LSPRs can amplify and enhance light-matter interactions, improving the sensitivity and resolution of spectroscopic techniques like Raman and fluorescence spectroscopy.
- Surface Enhanced Raman Scattering (SERS): Plasmonic surfaces can significantly enhance Raman signals from molecules adsorbed on their surface, enabling highly sensitive chemical detection.
- Metamaterials: By carefully engineering plasmonic structures, it is possible to create metamaterials with tailored optical properties, such as negative refractive index or super-resolution imaging capabilities.
- Plasmonic Photovoltaics: Plasmonic stru… Read full answer
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