Near-field infrared nanospectroscopy of surface phonon-polariton resonances
Abstract
We present combined experimental and numerical work on light-matter interactions at nanometer length scales. We report numerical simulations of near-field infrared nanospectroscopy that consider detailed tip geometry and have no free parameters. Our results match published spectral shapes of amplitude and phase measurements even for strongly resonant surface phonon-polariton (SPhP) modes. They also verify published absolute scattering amplitudes. A unique, ultrabroadband light source enables near-field amplitude and phase acquisition into the far-infrared spectral range. This allowed us to discover a strong SPhP resonance in the polar dielectric SrTi O3 (STO) at an ∼24 -μ m wavelength of incident light.
- Publication:
-
Physical Review Research
- Pub Date:
- June 2020
- DOI:
- 10.1103/PhysRevResearch.2.023272
- arXiv:
- arXiv:2006.05414
- Bibcode:
- 2020PhRvR...2b3272M
- Keywords:
-
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Condensed Matter - Materials Science;
- Physics - Optics
- E-Print:
- Physical Review Research 2, 023272 (2020)