Subwavelength electromagnetic diode: one-way response of cascading nonlinear meta-atoms

Abstract

We propose a scheme for realizing subwavelength electromagnetic diode by employing cascading nonlinear meta-atoms. One-way response is demonstrated on a microwave transmission line comprising of three metallic ring resonators acting as meta-atoms and a varactor as the nonlinear medium inclusion. Experiments show that our implementation can operate simultaneously as forward diode and backward diode at different frequencies. A transmission contrast of up to 14.7dB was achieved between forward and backward transmission. Subwavelength size of our diode should be useful for miniaturization of integrated optical nanocircuits.

References in corpus (5)

• Nonlinear properties of left-handed metamaterials
• Tunable split-ring resonators for nonlinear negative-index metamaterials
• Nonlinear properties of split-ring resonators
• Bistable diode action in left-handed periodic structures
• Nonlinear Electric Metamaterials

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