Dispersive Propagation of Terahertz Pulses in a Plasmonic Fiber

The dispersion properties of surface plasmon polaritons (SPPs) during propagation on metal wires with a dielectric coating in the terahertz frequency range were investigated theoretically. An analytical expression was obtained for pulsed electric field using solution Maxwell equations taking into account high-order terms. influence distortion pulse shape investigated. Unlike uncoated wire, pulses along coated wire is highly dispersive. It shown that leads to appearance long-chirped signal only few millimeters, i.e., when propagates it acquires long oscillatory tail, which depends time.