AI Article Synopsis
- Graphene is being explored as a transparent electrode for terahertz devices due to its high electrical conductivity and excellent frequency transmittance.
- A liquid crystal-based terahertz phase shifter was developed using graphene films, achieving a maximum phase shift of 10.8 degrees at a saturation voltage of 5 V.
- This phase shifter allows for continuous tuning, full electrical control, and operates with low DC voltage, while the transmittance and conductivity depend on the number of graphene layers used.
Article Abstract
Due to its high electrical conductivity and excellent transmittance at terahertz frequencies, graphene is a promising candidate as transparent electrodes for terahertz devices. We demonstrate a liquid crystal based terahertz phase shifter with the graphene films as transparent electrodes. The maximum phase shift is 10.8 degree and the saturation voltage is 5 V with a 50 µm liquid crystal cell. The transmittance at terahertz frequencies and electrical conductivity depending on the number of graphene layer are also investigated. The proposed phase shifter provides a continuous tunability, fully electrical controllability, and low DC voltage operation.
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| http://dx.doi.org/10.1364/OE.21.021395 | DOI Listing |
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