Spectro-Temporal Ratiometric Strategy for Thermally Invariant Optical Manometry.
basic_science · Level V
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- Record sourced from PubMed, PMID 41568608.
- Also identified by DOI 10.1002/adma.202522909.
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Abstract
Optical manometry provides noncontact pressure sensing but remains vulnerable to temperature-induced drift, where thermal expansion and nonradiative relaxation distort luminescence spectra and kinetics. We develop a spectro-temporal ratiometric approach that combines spectral and time-gated luminescence channels to decouple pressure and temperature responses and realize thermally invariant optical manometry. Using Y<sub>3</sub>In<sub>2</sub>Ga<sub>3</sub>O<sub>12</sub>:Cr<sup>3+</sup> as a rigid-lattice host (D<sub>q/B</sub> ≈ 2.2), lattice stiffness minimizes thermal sensitivity S<sub>R,T</sub>, while ratiometric detection stabilizes pressure sensitivity S<sub>R,p</sub>. The resulting thermal-invariance manometric factor (TIMF) = S<sub>R,p</sub>/S<sub>R,T</sub> reaches ≈7700 K·GPa<sup>-1</sup> in the spectral domain and ≈2500 K·GPa<sup>-1</sup> in the time-gated domain, with S<sub>R,p</sub> up to 51%·GPa<sup>-1</sup>. These values exceed ruby benchmarks by two orders of magnitude and surpass conventional lifetime analysis by ∼40 times, enabling accurate, self-referenced optical pressure mapping under extreme thermo-mechanical conditions. This work provides luminescent manometry from empirical calibration to a quantitative framework for thermally reliable sensing in coupled fields.