DNA detection by THz pumping
  Our results demonstrate a new method for label-free, real-time oligonucleotide characterisation by their self-resonant modes, which are unique to their conformation and sequence. We anticipate that our assay will be used as a starting point for a more detailed investigation of the aforementioned mechanism, which can be used as a basis for oligonucleotide detection and analysis. Furthermore, this technique can be applied to improve existing modern genetics technologies. 
Andrey L. Chernev, Nicolay T. Bagraev, Leonid E. Klyachkin, Anton K.   Emelyanov, Michael V. Dubina
cond-mat.mes-hall physics.bio-ph