Study of Leaky Waves Responsible for Terahertz TE Extroardinary Transmission

Extraordinary transmission (ET) via transverse electric (TE) modes through dielectric-backed periodic subwavelength slit arrays is largely owed to the leakage of energy from waves guided by the structure. This phenomenon is investigated in order to shed light on the leaky wave mechanism. Both angular transmission and temporal measurements are undertaken, revealing the origin of both the modes developed in the structures and the behaviour of the energy coupled to these modes.