Abstract-Highly sensitive terahertz dielectric sensor for small-volume liquid samples

A. Soltani1, H. Neshasteh2, A. Mataji-Kojouri2, N. Born1, E. Castro-Camus3,a), M. Shahabadi2 and M. Koch1

a) Author to whom correspondence should be addressed. Electronic mail: enrique@cio.mx

Appl. Phys. Lett. 108, 191105 (2016); http://dx.doi.org/10.1063/1.4949527

http://scitation.aip.org/content/aip/journal/apl/108/19/10.1063/1.4949527?TRACK=RSS

We present a resonator-based sensor for the measurement of the refractive index of dielectric liquidsamples. The proposed sensor operates on the basis of an electromagnetic resonance between a thinmetallic grating and a reflecting ground plane. The fluid whose refractive index is to be measured fills the region between the metallic grating and the ground plane and causes a considerable shift in the resonance frequency (>500 GHz/RIU). The sensor has a relatively simple structure; therefore, it can be manufactured economically on industrial scales.