  We present a method for the measurements of the tetrahertz (THz) resonance
response of DNA oligonucleotides deposited on a silicon nanosandwich (SNS). It
is shown that the SNS device can be used to generate a THz resonance response
within living biotissue. The technique we propose measures changes of the
longitudinal conductance and the lateral voltage with the SNS device in a Hall
geometry. The mechanism of the THz response is discussed, with a model of the
generation of Shapiro steps. The THz resonance response from living biotissues
will aid the diagnosis of oncological disease and, in general, form the basis
of a rapid diagnosis in practical medicine.
