Baseline Noise and Instability
Research gap analysis derived from 2 physics papers in our local library.
The gap
There is a need for robust methods to mitigate baseline noise and instability in low-absorption regimes when extracting optical parameters such as band gap and Urbach energy.
Consensus across the literature
The papers collectively highlight the challenges of dealing with baseline noise and instability, especially in low-absorption regions, but do not provide comprehensive solutions.
Research trend
Emerging — attention growing, methods still coalescing.
Supporting evidence — 2 representative gaps
- Standardized extraction of optical band gap and urbach energy in zno and al-doped zno thin films from uv–vis spectra: an in-silico workflow (2026) · doi
Urbach fitting is intrinsically more sensitive to the low-absorption regime, where baseline drift and noise represent a larger fraction of the signal, making EU extraction prone to instability.
Keywords: urbach fitting intrinsically sensitive absorption regime baseline drift noise represent larger fraction signal making extraction - Dynamic strain-gradient-induced polarization and nonlinear electromechanical coupling in noncentrosymmetric quantum oxide crystals (2026) · doi
Urbach-tail estimation is intrinsically more sensitive to the low-absorption regime, where baseline drift and noise represent a larger fraction of the signal, creating instability risks.
Keywords: urbach tail estimation intrinsically sensitive absorption regime baseline drift noise represent larger fraction signal creating
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