作者
B Sotillo, A Chiappini, V Bharadwaj, JP Hadden, F Bosia, Paolo Olivero, M Ferrari, R Ramponi, PE Barclay, SM Eaton
发表日期
2018/1/15
期刊
Applied Physics Letters
卷号
112
期号
3
出版商
AIP Publishing
简介
Understanding 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.
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B Sotillo, A Chiappini, V Bharadwaj, JP Hadden… - Applied Physics Letters, 2018