Presentation Information
[11a-A22-5]Spectral characterization of terahertz superluminal pulses on the periodically perforated metal slits
〇Borwen You1, Chen-Wei Lin1 (1.NCUE, Taiwan)
Keywords:
Terahertz spectroscopy,Metal slits,Superluminal pulse
Superluminal pulses, found on periodically perforated metal slits (PPMSs) and the compatible optomechatronic scheme, present broadband resonance absorption in the 0.1-1 terahertz (THz) frequency range. The response dispersion curves fluctuate due to Bragg scattering loss but can perform substantially by a small thickness of PPMSs. Based on the spatially extensible, pure metal structure of PPMSs, THz superluminal pulses can mimic the THz photon transition of an 1D lattice structure that correlates to the reacting cross-section of a probability density and present one intrinsic absorption character. The spectral properties of the broadband resonance absorption dependent on the photonic cross-section of PPMSs experimentally approximate those of infrared-ray resonantly absorbing media due to an anomalous dispersion.