(4.9) Excitons can absorb photons by making transitions to ex- cited states in exactly the same way that hydrogen atoms do. Calculate the wavelength of the photon required to promote an exciton in GaAs (u = from the n =1 to the n = 2 state. 0.05mo, er = 12.8) %3D %3D
(4.9) Excitons can absorb photons by making transitions to ex- cited states in exactly the same way that hydrogen atoms do. Calculate the wavelength of the photon required to promote an exciton in GaAs (u = from the n =1 to the n = 2 state. 0.05mo, er = 12.8) %3D %3D
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Transcribed Image Text:(4.9) Excitons can absorb photons by making transitions to ex-
cited states in exactly the same way that hydrogen atoms
do. Calculate the wavelength of the photon required to
promote an exciton in GaAs (µ
from the n = 1 to the n = 2 state.
= 0.05mo, er = 12.8)
%3D
%3D
(4 10) Use the Rohr model to show that the magnitude of the
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