Ultra-broadband, compact, and high-reflectivity circular Bragg grating mirror based on 220 nm silicon-on-insulator platform
Yang Wang, Shitao Gao, Ke Wang, Hongtao Li, Efstratios Skafidas
OPTICS EXPRESS | OPTICAL SOC AMER | Published : 2017
A compact (4.49 μm × 4.54 μm) and ultra-broadband circular Bragg grating mirror with relaxed fabrication requirements is proposed and demonstrated based on the 220 nm silicon-on-insulator (SOI) platform. Based on FDTD-simulations, the proposed grating mirror can achieve a reflectivity of >90% over a ultrabroad bandwidth of 500 nm (1263 - 1763 nm), and a high reflectivity of >95% over a broad bandwidth of 397 nm (1340 - 1737 nm), which covers the entire E- to U-bands. The circular grating is fabricated, and the experimental measurement results exhibit a high reflectivity of 93% - 98% within the measured band of 1530 to 1610 nm, which agrees well with simulations. Based on the proposed broadba..View full abstract
Awarded by Australian Research Council's DECRA funding scheme
Australian Research Council's DECRA funding scheme (project number DE150100924).