[We-A2-E] THz/MIR spectroscopy and devices

12:00 PM - 12:15 PM JST(3:00 AM - 3:15 AM UTC)

[We-A2-E-04] Optical constants (n, κ) and absorption of BiSb topological insulator in Mid-infrared region measured by RT technique

〇Hajime Nishiyama², Pham Nam Hai², Tomohiro Amemiya², Shun Hashiyada¹, Yukio Kawano^1,3 (1. Chuo Univ. (Japan), 2. Science Tokyo (Japan), 3. NII (Japan))

We investigated the mid-infrared optical properties of sputtered BiSb thin films using reflectance–transmittance analysis. The films exhibit large refractive index (6–9), strong extinction (2–6), and up to 30% MIR absorption, highlighting BiSb as a promising, low-cost material for MIR photodetectors.