Infrared nanospectroscopic imaging in the rotating frame

• DOI: 10.1364/optica.6.000424
• Publication Date: 2019-04-02T15:01:19Z
• Authors: Samuel C. Johnson; Eric A. Muller; Omar Khatib; Elisa A. Bonnin; Alexander C. Gagnon; Markus B. Raschke
• Keywords: 02 engineering and technology; 0210 nano-technology

Infrared (IR) vibrational scattering scanning near-field optical microscopy (s-SNOM) has advanced to become a powerful nanoimaging and spectroscopy technique with applications ranging from biological quantum materials. However, full spatiospectral s-SNOM continues be challenged by long measurement times drift during the acquisition of large associated datasets. Here, we demonstrate novel approach computational transforming basis stationary frame into rotating IR carrier frequency. We an acceleration data collection factor 10 or more in combination prior knowledge electronic resonances probed, source excitation spectrum, other general sample characteristics. As example, apply rotating-frame (R-sSNOM) chemical ultrathin protein sheets mollusk shell. R-sSNOM enables high-voxel-density imaging sparsely distributed molecules extended matrix. It is generally applicable many multiscale material systems sparse features can spectroscopic modalities.