Fig. 5: Theoretical sensitivity to the subwavelength-scale area of the thin layers of molecules.
From: On-chip phonon-enhanced IR near-field detection of molecular vibrations
a Simulated normalized graphene absorption spectra for a 300 nm-wide stripe and different thicknesses of CBP molecules placed on top of the p–n junction of the detector. Inset shows the schematic side view of the graphene split-gate detector partially covered by the molecular stripe. b Simulated normalized transmission spectra through the 300 nm-wide stripe and different thicknesses of CBP molecules placed on top of the CaF2 substrate, assuming the 3 μm-wide light beam. Curves are shifted vertically for clarity. Inset shows the schematic side view of the molecular stripe in the mid-IR focus with a waist of 3 μm. Note that in contrast to Fig. 3, the simulated spectra are not convoluted. Source data are provided as a Source Data file.
