Non-Linear Optical Studies of IR Materials with Infrared Femtosecond Laser
Abstract
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 15, 2016
- Accession Number
- AD1031239
Entities
People
- Enam Chowdhury
Organizations
- Ohio State University