Metamaterial inspired probe for noninvasive near-field subsurface sensing

In this work, a new EMP design is provided. By inserting an electrically small planar resonator a unit cell of single negative media to a simple rectangular loop, the evanescent field in the near-field region is enhanced. As a result the sensitivity of the probe is improved significantly compared to a probe without SRR. The experiments in different media indicate that the new probe has the ability to sense inclusions buried in lossy media. In addition, the fabrication of the probe is easy and inexpensive.