Nonlinear absorption in indium arsenide
Abstract
Using a free-electron laser source, we have studied the nonlinear absorption in indium arsenide at three representative wavelengths: 4.55, 5.06, and 6.30 μm. By measuring the temperature dependence of the two-photon-absorption (TPA) coefficient we have been able to discriminate between parabolic and nonparabolic band models of the TPA process. Using an extension of these methods we were also able to measure the free-carrier absorption induced by TPA and to demonstrate the importance of other higher-order absorption processes.
- Publication:
-
Physical Review B
- Pub Date:
- March 1997
- DOI:
- 10.1103/PhysRevB.55.7148
- Bibcode:
- 1997PhRvB..55.7148B