Compact Birefringent Waveplates Photo-Induced in Silica by Femtosecond Laser

被引：17

作者：

Lancry, Matthieu ^{[1
]}

Desmarchelier, Rudy ^{[1
]}

Cook, Kevin ^{[2
]}

Poumellec, Bertrand ^{[1
]}

Canning, John ^{[2
]}

机构：

[1] Univ Paris 11, Inst Chim Mol & Mat Orsay, UMR CNRS UPSud 8182, F-91405 Orsay, France

[2] Univ Sydney, Sch Chem, interdisciplinary Photon Labs, Sydney, NSW 2006, Australia

来源：

MICROMACHINES | 2014年 / 5卷 / 04期

基金：

澳大利亚研究理事会;

关键词：

silica; ultrafast processes in condensed matter; laser-induced chemistry; femtosecond phenomena; WAVE-GUIDES; DEFECTS; GLASS; NANOGRATINGS;

D O I：

10.3390/mi5040825

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Recently, we showed that femtosecond laser induced "nanogratings" consist of thin regions with a low refractive index (Delta n = -0.15), due to the formation of nanoporous silica surrounded by regions with a positive index change. In this paper, we investigate a wide range of laser parameters to achieve very high retardance within a single layer; as much as 350 nm lambda = 546 nm but also to minimize the competing losses. We show that the total retardance depends on the number of layers present and can be accumulated in the direction of laser propagation to values higher than 1600 nm. This opens the door to using these nanostructures as refined building blocks for novel optical elements based on strong retardance.

引用

页码：825 / 838

页数：14