Terahertz-to-infrared emission through laser excitation of surface plasmons in metal films with porous nanostructures

• DOI: 10.1364/oe.23.017185
• Publication Date: 2015-06-23T22:02:54Z
• Authors: Liangliang Zhang; Ji Zhao; Tong Wu; Cunlin Zhang; X.-C. Zhang
• Keywords: 0103 physical sciences; 01 natural sciences

We report on the investigation of terahertz-to-infrared (THz-to-IR) thermal emission that relies excitation surface plasmons in metal films deposited a substrate with randomly ordered nanoscale pore arrays. The THz-to-IR radiation was observed both direction laser beam propagation and reverse direction. intensity ratio between backward forward is exponentially dependent nominal thickness porous films. findings are discussed view proposed generation mechanism based propagating plasmon polaritons air/metal metal/substrate interfaces.