Strong Long-Wave Infrared Optical Response in a Topological Semiconductor with a Mexican Hat Band Structure

Mark J. Polking, Haowei Xu, Raman Sankar +2

Light sources and photodetectors operating in the far- to mid-infrared (FIR/MIR) band ($8$-$12\hat{\mathrm{I}}¼\mathrm{m}$, $0.1$-$0.15\mathrm{eV}$) remain relatively poorly developed compared to their c…