The term "photothermal ratio" typically refers to a measure used in the context of materials, especially in fields like photothermal therapy, solar energy conversion, and photothermal imaging. It quantitatively describes the efficiency of a material in converting absorbed light (or photons) into heat. In general, the photothermal ratio can be defined as the ratio of the amount of heat generated by a material in response to light absorption to the amount of light energy that is incident on the material.
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