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Thermo-optical measurements using quantitative phase microscopy
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DOI：10.1364/OL.489182.png)
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Abstract
En 中文
Quantitative phase microscopy (QPM) literally images the quantitative phase shift associated with image contrast, where the phase shift can be altered by laser heating. In this study, the thermal conductivity and thermo-optic coef-ficient (TOC) of a transparent substrate are simultaneously determined by measuring the phase difference induced by an external heating laser using a QPM setup. The sub-strates are coated with a 50-nm-thick titanium nitride film to photothermally generate heat. Then, the phase difference is semi-analytically modeled based on the heat transfer and thermo-optic effect to simultaneously extract the thermal conductivity and TOC. The measured thermal conductivity and TOC agree reasonably well, indicating the potential for measuring the thermal conductivities and TOCs of other transparent substrates. The concise setup and simple mod -eling differentiate the advantages of our method from other techniques. & COPY; 2023 Optica Publishing Group
Keywords:
TEMPERATURE-DEPENDENCE
REFRACTIVE-INDEXES
COEFFICIENTS
SAPPHIRE
Journal
IF:
3.3
Papers:
4.0W
Citations:
7.6W