Question: A 0 . 7 m thick GaAs sample is illuminated with 1 0 mW of light. GaAs has a bandgap energy of Eg = 1

A 0.7m thick GaAs sample is illuminated with 10 mW of light. GaAs has a bandgap energy of Eg =1.43 eV and an absorption constant =5 x 104 cm-1. a. Find the total energy absorbed by the GaAs sample, in J/s.(9 pts) b. What is the excess thermal energy? (8 pts) c. What is the number of photons/second from the recombination of the EHP (electron hole pair)?(8 pts)

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