Biomedical Applications of Terahertz Near-field Imaging

We demonstrate the THz near-field nano-imaging of Bacillus cereus and Corona Virus Disease 2019 (COVID-19) spike fake virus utilizing THz scattering near-field optical microscopy (SNOM). Here, it shows that bacteria and virus can be distinguished from other substances by THz near-field imaging. And we can use the THz time-domain spectrometer (TDS) scattering near field microscope(s-SNOM) to obtain the spectrum of different substances (bacteria and their substrate), then analyzing the differences between them from their specific responses in THz. This is of great significance to development of the terahertz near-field biology.