Before revision: Above conductivity equation can be expressed as follows: Here is the elementary charge, is the transmittance of the sample at the excitation wavelength, is the incident laser fluence, is the quantam yield of photo-carrier generation per absorbed photon, is the sum of the electron and hole mobility, is the thickness of the sample.
After revision: Above conductivity equation can be expressed as follows: Here is the elementary charge, is the transmittance of the sample at the excitation wavelength, is the incident laser fluence, is the quantum yield of photo-carrier generation per absorbed photon, is the sum of the electron and hole mobility, is the thickness of the sample.