1. Optical Processes in Semiconductors: Review A. Aydınlı

2. PL Emission of optical radiation resulting from excitation to a nonequilibrium state by irradiation with light. Create electron-hole pairs by absorption of exciting light Radiative recombination of electron-hole pairs Escape of recombination radiation from the sample.

3. PL Sensitive (compared to absorption) Nondestructive Simple to perform Considerable analysis may be required to reach the physical mechanism

4. Electron-Photon Interaction Solve: To obtain:

5. Fermi’s Golden Rule Interaction energy between the radiation field and atomic system can be written either

6. Absorption/Emission

7. DOS

8. Transitions in Bulk

9. Emission vs Gain

10. Direct Gap Absorption

12. Absorption in QW

13. Population Inversion in a QW

14. Intersubband Absorption

16. Inter- and intraimpurity Transitions

17. Free-bound:

18. Band-band:

19. Degeneracy: