Phys. Rev. B 79, 245135 (2009) [5 pages]Nonlinear control of tunneling through an epsilon-near-zero channelReceived 29 January 2009; revised 13 May 2009; published 29 June 2009 The epsilon-near-zero (ENZ) tunneling phenomenon allows full transmission of waves through a narrow channel even in the presence of a strong geometric mismatch. Here we experimentally demonstrate nonlinear control of the ENZ tunneling by an external field, as well as self-modulation of the transmission resonance due to the incident wave. Using a waveguide section near cut-off frequency as the ENZ system, we introduce a diode with tunable and nonlinear capacitance to demonstrate both these effects. Our results confirm earlier theoretical ideas on using an ENZ channel for dielectric sensing and their potential applications for tunable slow-light structures. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.79.245135
DOI:
10.1103/PhysRevB.79.245135
PACS:
42.82.Et, 41.20.Jb, 42.65.Wi
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