Zhou Feng
College of Media Engineering, Communication University of Zhejiang, Hangzhou, 310018, China.
Heliyon. 2024 Jul 15;10(14):e34684. doi: 10.1016/j.heliyon.2024.e34684. eCollection 2024 Jul 30.
We theoretically present a broadband modulator based on graphene/black phosphorus heterostructure which can work over a large waveband from visible (VIS) to mid-infrared (MIR) regions. By utilizing the angle dependence of black phosphorus, surface plasmon polaritons (SPP) modulation can be achieved in VIS regime, while the wavelength is tuned within the near-infrared (NIR) or MIR regions, the enhanced modulation depth can be achieved by few-layer graphene films. Results show that the proposed plasmonic modulator exhibits a broad waveband from 400 nm to 3 μm. In addition, this proposed modulator features high modulation depth (MD), low insertion loss (IL), large 3-dB modulation bandwidth and small power consumption from VIS to MIR regions. Our work may extend the operation waveband of opto-electro devices based on the hybridized 2D materials and would promote their potential future applications.
我们从理论上提出了一种基于石墨烯/黑磷异质结构的宽带调制器，它可以在从可见光（VIS）到中红外（MIR）区域的大波段上工作。通过利用黑磷的角度依赖性，在可见光区域可以实现表面等离激元极化激元（SPP）调制，而当波长在近红外（NIR）或中红外区域调谐时，通过几层石墨烯薄膜可以实现增强的调制深度。结果表明，所提出的等离子体调制器在400纳米至3微米范围内呈现出宽波段。此外，这种所提出的调制器具有高调制度（MD）、低插入损耗（IL）、大3分贝调制带宽以及从可见光到中红外区域的低功耗。我们的工作可能会扩展基于二维材料杂交的光电器件的工作波段，并将推动它们未来的潜在应用。
