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Monolayer NaW2O2Br6: a gate tunable near-infrared hyperbolic plasmonic surface
Enhui Huang1, Hui Xiang2, Han Jiao1
1School of Science and Key Laboratory of Biomedical Functional Materials, China Pharmaceutical University Nanjing 211198 P. R. China wyzhong@cpu.edu.cn xubo@cpu.edu.cn.
Nanoscale Advances
|September 22, 2022
Summary
Monolayer NaW2O2Br6 hosts tunable hyperbolic polaritons for infrared light. Its anisotropic metallic properties allow electrical modulation for nanodevices, paving the way for integrated photonics.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanophotonics
Background:
- Two-dimensional (2D) materials offer novel platforms for integrating photonics and nano-optoelectronics.
- Hyperbolic polaritons in 2D materials are crucial for advanced optical devices.
Purpose of the Study:
- To investigate the potential of monolayer NaW2O2Br6 for hosting electrically tunable hyperbolic plasmon polaritons.
- To explore the modulation of hyperbolic properties via carrier doping.
Main Methods:
- First-principles calculations were employed to study the electronic and optical properties of monolayer NaW2O2Br6.
- Anisotropic metallic behavior and hyperbolic characteristics were analyzed.
Main Results:
- Monolayer NaW2O2Br6 exhibits extreme anisotropy, acting as a 2D analogue of hyperbolic metamaterials.
- Hyperbolic properties, including windows and figure of merit, are tunable by carrier doping (10^13 cm^-2).
- Modulation is achievable via solid-gated field-effect transistors.
Conclusions:
- Monolayer NaW2O2Br6 is a promising material for electrically tunable hyperbolic polaritons in the near-infrared range.
- This material holds significant potential for developing field-programmable polariton nanodevices for diverse photonic applications.
