Tunable broadband terahertz metamaterial absorber using multi-layer black phosphorus and vanadium dioxide
- 1 April 2020
- journal article
- research article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 53 (14), 145105
- https://doi.org/10.1088/1361-6463/ab6af4
Abstract
We propose a dual-controlled switchable broadband metamaterial sandwich-structured absorber composed of black phosphorus (BP) and vanadium dioxide (VO2), suitable for operation in the terahertz range. The proposed absorber consists of multi-layered sinusoidally patterned BP, sandwiched between dielectric layers, and a VO2 bottom layer. Numerical results reveal that the broadband absorption can be dynamically tuned over a wide range by adjusting the electron doping of BP and conductivity of VO2. Owing to the fully metallic state of VO2, the proposed absorber realizes a more than 98% absorptance with the bandwidth of 2.9 THz under TE polarization and more than 90% absorptance with the bandwidth of 3.25 THz under TM polarization when the armchair direction of BP is along the y-axis and x-axis, respectively. Most importantly, by utilizing the dual independent controls in tandem, the state of proposed absorber can be switched from absorption (>98%) to reflection (>63.5%) while maintaining the broad bandwidth. Our research that utilizes the advantages of BP and VO2 presents a new perspective on the design of tunable broadband THz absorbers promising for potential applications such as switching, modulation, and sensing.Funding Information
- National Natural Science Foundation of China (61875106)
This publication has 40 references indexed in Scilit:
- Broadband Terahertz Wave Deflection Based on C‐shape Complex Metamaterials with Phase DiscontinuitiesAdvanced Materials, 2013
- Graphene plasmonicsNature Photonics, 2012
- Unique prospects for graphene-based terahertz modulatorsApplied Physics Letters, 2011
- Graphene photonics and optoelectronicsNature Photonics, 2010
- Terahertz metamaterials with VO2 cut-wires for thermal tunabilityApplied Physics Letters, 2010
- Infrared Perfect Absorber and Its Application As Plasmonic SensorNano Letters, 2010
- Dual band terahertz metamaterial absorber: Design, fabrication, and characterizationApplied Physics Letters, 2009
- The rise of grapheneNature Materials, 2007
- Metal-insulator phase transition in athin film observed with terahertz spectroscopyPhysical Review B, 2006
- Electromagnetic parameter retrieval from inhomogeneous metamaterialsPhysical Review E, 2005