Non-Volatile Reconfigurable Transmissive Notch Filter Using Wide Bandgap Phase Change Material Antimony Sulfide

We experimentally demonstrate an electrically tunable notch filter. We observe a quality factor up to ~200 and demonstrate reversible tuning of a large volume $(4.5 \mu \mathrm{m}^{3})$ of Sb2S3 with resonance wavelength shift ~4 nm.