Long-wave infrared super-resolution wide-field microscopy using sum-frequency generation
Abstract
Super-resolution microscopy in the visible is an established powerful tool in various disciplines. In the long-wave infrared (LWIR) spectral range, however, no comparable schemes have been demonstrated to date. In this work, we experimentally demonstrate super-resolution microscopy in the LWIR range (λIR≈10–12 μm) using IR-visible sum-frequency generation. We operate our microscope in a wide-field scheme and image localized surface phonon polaritons in 4H-SiC nanostructures as a proof-of-concept. With this technique, we demonstrate an enhanced spatial resolution of ∼λIR/9, enabling to resolve the polariton resonances in individual sub-diffractional nanostructures with sub-wavelength spacing. Furthermore, we show that this resolution allows us to differentiate between spatial patterns associated with different polariton modes within individual nanostructures.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 28, 2022
- Source ID
- 10.1063/5.0081817
Entities
People
- Alexander Paarmann
- Guanyu Lu
- Joshua D Caldwell
- Marco De Pas
- Martin Wolf
- Richarda Niemann
- Sandy Gewinner
- Sören Waßerroth
- Wieland Schöllkopf
Organizations
- Army Research Office
- Max Planck Society
- National Aeronautics and Space Administration
- Vanderbilt University