Journal
NANOMATERIALS
Volume 10, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/nano10091694
Keywords
black phosphorus; hyperbolic metamaterials; photonic topological transition; anisotropy; angular optical transparency
Categories
Funding
- National Natural Science Foundation of China [1148081606193050]
- Fundamental Research Funds for the Central Universities [JUSRP115A15, JUSRP21935, JUSRP51628B]
- Graduate Research and Innovation Projects of Jiangsu Province [KYCX20_1929]
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Based on in-plane anisotropy of black phosphorus (BP), anisotropic photonics topological transition (PTT) can be achieved by the proposed hyperbolic metamaterials structure, which is composed of alternating BP/SiO2 multilayer. Through effective medium theory and calculated iso-frequency contour, PTT can be found by carefully choosing the incident plane and other parameters. With the finite element method and transfer matrix method, a narrow angular optical transparency window with angular full width at half maximum of 1.32 degrees exists at PTT. By changing the working wavelength, thickness of SiO2, or electron doping of black phosphorus, the incident plane of realizing PTT can be modulated, and anisotropic PTT is achieved.
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