s-SNOM imaging of neaSCOPE operates in tapping mode, where the tip height is modulated with a frequency Ω and the detector signal is demodulated at higher harmonics of this frequency, 2Ω, 3Ω, etc. Different harmonics probe different sample volumes: higher harmonics are more surface sensitive, while lower harmonics probe the in-depth structure, providing means for separating surface phenomena from bulk and enabling nanoscale depth profiling.
neaSCOPE measures multiple harmonics simultaneously
Standard systems only measure one harmonic
neaSCOPE is the only comercial nanoscale microscope that:
- Simultaneous measurement of up to 5 demodulation harmonics
- Surface & subsurface characterization by analysis of multiple harmonics