An electromagnetic modulator based on electrically controllable metamaterial analogue to electromagnetically induced transparency

Abstract

Electromagnetically induced transparency (EIT) is a promising technology for the enhancement of light-matter interactions, and recent demonstrations of the EIT analogue realized in artificial micro-structured medium have remarkably reduced the extreme requirement for experimental observation of EIT spectrum. In this paper, we propose to electrically control the EIT-like spectrum in a metamaterial as an electromagnetic modulator. A diode acting as a tunable resistor is loaded in the gap of paired wires to inductively tune the magnetic resonance, which induces remarkable modulation on the EIT-like spectrum through the metamaterial sample. The experimental measurements confirmed that the prediction of electromagnetic modulation in three narrow bands on the EIT-like spectrum, and a modulation contrast of up to 31 dB was achieved on the transmission through the metamaterial. Our results may facilitate the study on active/dynamical technology in translational metamaterials, which connect extraordinary manipulations on the flow of light in metamaterials, e.g., the exotic EIT, and practical applications in industry.

Controllable and Large-Scale Synthesis of Carbon Nanostructures: A Review on Bamboo-Like Nanotubes

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Enhanced THz EIT resonance based on the coupled electric field dropping effect within the undulated meta-surface

“…Terahertz bandpass devices, such as the THz modulators and sensing devices [14], have been developed by applying the transparency window of the EIT. Recently, in order to achieve more transparent window, many studies have been carried out to optimize the EIT effect by adapting the analysis mode [13], coupling [15][16][17][18][19][20][21], absorption [22][23][24][25][26][27], and active tuning [28][29][30]. Gu et al observed the excitation and tuning of EIT by the interference between different excitation pathways of the dark mode in a planar terahertz metamaterial [10].…”

Tuning Plasmon Induced Reflectance with Hybrid Metasurfaces

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