Fig. 1. Graphene-hBN heterostructure

Fig. 2. Dielectric constant of hBN and reflectance of structure with different wavelengths. (a) Real and imaginary parts of dielectric constant of hBN; (b) reflectance

Fig. 3. Variation in reflectance, reflection phase and GH shift with incident angle under the different E_f. (a) Reflectance; (b) reflection phase; (c) GH shift

Fig. 4. Variation in reflectance, reflection phase and GH shift with incident angle under the number of graphene layers. (a) Reflectance; (b) reflection phase; (c) GH shift

Fig. 5. Two-dimensional pseudo-color distribution diagram plot of GH shift versus incident angle and thickness of hBN. (a) d=1.20~1.53 μm; (b) d=1.54~1.80 μm

Fig. 6. Variation curve of GH shift with hBN thickness