Dense arrays of microscopic optical vortex generators from femtosecond direct laser writing of radial birefringence in glass

[摘要]：We report on the generation of permanent singular light mode converters at the microscale using femtosecond direct laser writing in photo-thermo-refractive glass. It relies on the irreversible light-induced radial birefringence in the bulk of the material. The ability of such birefringence pattern to convert the spin angular momentum of light into orbital optical angular momentum is exploited to demonstrate the production of large arrays of optical vortex generators with surface densities up to 10(4) cm(-2). (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4705414]

[全文传递流程]：

一般上传文献全文的时限在1个工作日内