Sample interview questions: Can you explain the concept of plasmonic waveguides and their potential applications?
Sample answer:
Concept of Plasmonic Waveguides:
Plasmonic waveguides are nanoscale structures that utilize surface plasmon polaritons (SPPs) to confine and guide electromagnetic waves. SPPs are hybrid waves that arise at the interface between a metal and a dielectric, exhibiting a strong electric field that decays exponentially into both media.
Potential Applications:
The unique properties of plasmonic waveguides offer a wide range of potential applications, including:
- Subwavelength Optics: Plasmonic waveguides enable the manipulation of light below the diffraction limit, enabling advanced optical devices such as super-resolution imaging and nano-antennas.
- Enhanced Light-Matter Interactions: Plasmonic waveguides can concentrate light in subwavelength volumes, resulting in enhanced nonlinearities and sensing capabilities.
- Bio-sensing: Plasmonic waveguides can be used as highly sensitive biosensors, detecting biomolecules and DNA through label-free and real-time monitoring.
- Plasmonic Circuits: Plasmonic waveguides can be integrated int… Read full answer