
Why Is My Quartz Cuvette Not Transparent in the Mid-IR Range
Quartz cuvettes deliver exceptional UV performance — yet place one in a mid-IR beam and the spectrum collapses entirely. The explanation is rooted in atomic physics, not instrument failure. Fused silica’s Si-O bond network generates intense intrinsic absorption bands that fall squarely within the 400–4000 cm⁻¹ mid-infrared window. This article dissects every vibrational, electronic, and phonon mechanism responsible for that













