Multiple poles resonances coupling with high sensitivity sensing for multiple bulging black phosphorus-based metasurface

Herein, a multiple bulging black phosphorus (BP)-based metasurface is proposed for studying its reflection responses and sensing performances through the finite-difference time-domain simulation method. It is shown that, the reflection dips are caused by the coupling between dipole resonance modes and poly-poles resonance modes. Moreover, the dipoles resonance modes and poly-poles resonance modes can mutually enhance and inhibit each other, and tunable reflection spectra can be realized by symmetrically and asymmetrically adjusting the bulging of the proposed BP-based metasurface. In addition, the reflection spectra as a function of the polarization of incident light are discussed. We can find that a dipole resonance mode on the vertical side at the direction of ZZ for BP is gradually fully excited, resulting in an additional obvious reflection dip as the polarization angle theta increases from 0 degrees to 90 degrees. Especially, the sensing performance with the maximum of sensitivity S = 1.5 mu m/RIU can be realized in the proposed BP-based metasurface. The results may provide a way to design micro-nano plasmonic devices.

Automated summary

In this paper, a multiple bulging black phosphorus (BP)-based metasurface is proposed to study its reflection responses and sensing performances. The results show that the reflection dips are caused by the coupling between dipole resonance modes and poly-poles resonance modes. Furthermore, the dipoles resonance modes and poly-poles resonance modes can mutually enhance and inhibit each other, and tunable reflection spectra can be achieved by symmetrically and asymmetrically adjusting the bulging of the proposed BP-based metasurface. Additionally, the reflection spectra as a function of the polarization of incident light are discussed. It is found that a dipole resonance mode on the vertical side at the direction of ZZ for BP is gradually fully excited, resulting in an additional obvious reflection dip as the polarization angle theta increases from 0 degrees to 90 degrees. Particularly, the proposed BP-based metasurface demonstrates a sensing performance with the maximum sensitivity S = 1.5 mu m/RIU. The results may provide a way to design micro-nano plasmonic devices.