8109
We present a comprehensive experimental study of the photophysical properties of a molecule - cavity system under strong coupling conditions , using steady - state and femtosecond time - resolved emission and absorption techniques to selectively excite the lower and upper polaritons as well as the reservoir of uncoupled molecules .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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