Broadband and wide-angle beam deflection enabled by reconfigurable meta-arrays

We present a structurally simple yet functionally versatile reflective meta-array composed of phase-change antimony trisulfide (Sb₂S₃) nanorods enabling broadband and wide-angle beam deflection in the near-infrared. The device achieves over 80% deflection efficiency over a 1000 nm wide passband, and covering from O-band (1260-1360 nm) to U-band (1565-1625 nm) in the <i>amorphous</i> state. Meanwhile, in its <i>crystalline</i> state, we see a reduction of the efficiency to 40% on average with a maximum passband of 800 nm over the C-band. Moreover, its simple architecture simultaneously enables spectral filtering and beam splitting, delivering a compact, multifunctional solution optimized for high power attenuation.