Non-Linear Optical Studies of IR Materials with Infrared Femtosecond Laser
Technical Report,15 Sep 2014,15 Nov 2016
Ohio State University Columbus United States
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Intense femtosecond mid-IR MIR pulses from 2 - 4 micron wavelength at a 1 kHz repetition rate were used to explore nonlinear effects into various MIR materials like germanium and indium antimonide, including laser induced damage, defect generation, laser induced periodic structure formation LIPSS etc. Indium Antimonide, an important IR detector material, was studied with 2 and 1.55 micron femtosecond MIR lasers. LIPSS like structures were generated by 2 micron pulses. MIR studies with Ge revealed that it supports formation of two different types of LIPSS, the low spatial frequency and the high spatial frequency LIPSS, depending on surface fluence of the MIR femtosecond pulses, with different mechanisms.
- Lasers and Masers