AI Article Synopsis
- A new device using Dirac semimetal films and vanadium dioxide (VO) allows for tunable functionality in terahertz (THz) applications.
- The phase change of VO from insulator to metal enables it to switch between asymmetric transmission and dual-directional absorption of THz waves.
- The device's performance can be adjusted by changing the Fermi energy of the semimetal films, providing innovative possibilities for multifunctional THz technology.
Article Abstract
A tunable bifunctional terahertz (THz) metamaterial device based on Dirac semimetal films (DSFs) and VO is presented. The insulator-to-metal phase transition of VO enables bifunctional asymmetric transmission and dual-directional absorption to be switched in the THz range. When VO serves as a dielectric, tunable broadband asymmetric transmission of linearly polarized THz waves can be achieved. When VO is in a metallic state, the proposed device acts as a tunable dual-directional absorber with perfect absorption in both illumination directions. In each case, the response can be tuned by varying the Fermi energy of the DSFs. This offers a new pathway for the development of tunable multifunctional THz metamaterial devices.
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| http://dx.doi.org/10.1364/OE.394784 | DOI Listing |
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