High-Sensitivity Multiband Detection Based on the Local Enhancement Effect of an Electric Field at Terahertz Frequency

Figure 6

Influence of the refractive index change of the sample on the sensor’s resonance characteristics. (a) The sensor detects the reflection spectrum of a sample with a certain thickness and different refractive indices. (b) The resonance frequency shift of the terahertz sensor changes with the refractive index of the sample.

(a)

(b)