Spectral dependence of femtosecond laser induced circular optical properties in silica

Jing Tian (1) , Rubing Li (2) , Sang Hyuk Yoo (3) , Bertrand Poumellec (1) , Enric Garcia-Caurel (3) , Razvigor Ossikovski (3) , Michel Stchakovsky (4) , Céline Eypert (5) , John Canning (6) , Matthieu Lancry (1)

1 ICMMO - Institut de Chimie Moléculaire et des Matériaux d'Orsay
2 Beijing University of Technology
3 LPICM - Laboratoire de physique des interfaces et des couches minces [Palaiseau]
4 HORIBA France SAS [Longjumeau]
5 Horiba - HORIBA Europe Research Center [Palaiseau]
6 UTS - University of Technology Sydney

Transmission Mueller-matrix spectroscopic ellipsometry is applied to study femtosecond laser induced nanogratings in silica glass in a wide spectral range 250-1800 nm. By using differential decomposition of the Mueller matrix, the circular birefringence and dichroism of femtosecond laser irradiated SiO 2 are quantified for the first time in the UV and Near-IR range. A maximum value of the effective specific rotation of α ~ 860°/mm at 290 nm is found. In the near-IR range, we found a linear and circular dichroism band peaking around 1240 nm, which might be attributed to the formation of anisotropic species like the formation of oriented OH species and Si-O-Si bond.

Domaines: Matériaux

Jing Tian, Rubing Li, Sang Hyuk Yoo, Bertrand Poumellec, Enric Garcia-Caurel, et al.. Spectral dependence of femtosecond laser induced circular optical properties in silica. OSA Continuum, 2019, 2 (4), pp.1233. ⟨10.1364/OSAC.2.001233⟩. ⟨hal-02354006⟩