Polarized micro-Raman studies of femtosecond laser written stress-induced optical waveguides in diamond
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2018-01-15 |
| Journal | Applied Physics Letters |
| Authors | BelƩn Sotillo, Andrea Chiappini, Vibhav Bharadwaj, John P. Hadden, Federico Bosia |
| Institutions | Politecnico di Milano, National Research Council |
| Citations | 30 |
Abstract
Section titled āAbstractāUnderstanding the physical mechanisms of the refractive index modulation induced by femtosecond laser writing is crucial for tailoring the properties of the resulting optical waveguides. In this work, we apply polarized Raman spectroscopy to study the origin of stress-induced waveguides in diamond, produced by femtosecond laser writing. The change in the refractive index induced by the femtosecond laser in the crystal is derived from the measured stress in the waveguides. The results help to explain the waveguide polarization sensitive guiding mechanism, as well as provide a technique for their optimization.