【論文】”Laser-Inscribed Stress-Induced Birefringence of Sapphire”

【論文】”Laser-Inscribed Stress-Induced Birefringence of Sapphire”

WRHIからのお知らせおすすめ

物質理工学院 森川淳子教授とSaulius Juodkazis特任教授の共著論文

“Laser-Inscribed Stress-Induced Birefringence of Sapphire”

が、Nanomaterialsに掲載されました。(DOI: https://doi.org/10.3390/nano9101414

 

 

<Abstract>

Birefringence of 3×1033×10-3 is demonstrated inside cross-sectional regions of 100 μμ m, inscribed by axially stretched Bessel-beam-like fs-laser pulses along the c-axis inside sapphire. A high birefringence and retardance of λ/4λ/4 at mid-visible spectral range (green) can be achieved using stretched beams with axial extension of 30–40 μμ m. Chosen conditions of laser-writing ensure that there are no formations of self-organized nano-gratings. This method can be adopted for creation of polarization optical elements and fabrication of spatially varying birefringent patterns for optical vortex generation.