Electron-Beam Evaporated Nb2O5/MgF2 Bilayers for One-Dimentional Photonic Crystals Applications

In this paper, we reported a high reflective one-dimensional (1D) photonic crystal (PhC) fabricated by using electron-beam (e-beam) evaporation process. The 1D PhC has a structure of periodical arrangement of Nb
₂
O
₅
/MgF
₂
bilayers. By controlling the number of the bilayer pairs, the center wavelengths (λ
₀
) of the reflected light can be adjusted close to 450 nm or 500 nm. It is found that the peak reflectivity can be up to 90% for the PhC with 4 or 6 Nb
₂
O
₅
/MgF
₂
bilayer pairs. The stop band width is approximate 150 nm.