AI Article Synopsis
- The study focuses on creating a carbon nanotube (CNT) integrated metamaterial designed for controlling orthogonal polarization in the terahertz (THz) frequency range, featuring a layered structure with metal gratings.
- The mechanism involves multilayer polarization selection and multiple reflections within a CNT micro-cavity, resulting in effective polarization conversion and a transmittance spectrum with distinct peaks and valleys in line with theoretical predictions.
- By varying the number and orientation of CNT layers, researchers successfully modulated both amplitude and phase, achieving strong agreement between simulations and experimental results, ultimately paving the way for advanced THz devices.
Article Abstract
Herein, we fabricated and investigated the carbon nanotube (CNT) integrated metamaterial for orthogonal polarization control in the THz regime, which is composed of a sandwiched CNT layer with the adjacent metal gratings in the sub-wavelength integration. Under the mechanism of multilayer polarization selection and multiple reflections in CNT constructed micro-cavity, the perfect orthogonal polarization conversion is achieved and the transmittance spectrum presents multi-band peaks and valleys, which coincide with the theoretical Fabry-Perot resonance. Besides, by controlling the layer number and orientations of the middle CNT, the active modulation of the amplitude and phase in compound metamaterials are realized. Based on the simulation of CNT in the grating model, it obtains a good agreement with the experimental results, and the simulated electric field distribution also confirmed the inner polarization conversion mechanism. This work combines nanomaterials with optical microstructures and successfully applies them to the THz polarization control, which will bring new ideas for design novel THz devices.
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| http://dx.doi.org/10.1364/OE.421552 | DOI Listing |
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