Bruce G Klappauf

Birefringent Fresnel zone plates in silica fabricated by femtosecond laser machining.

Jeremy J Baumberg, J. Baumberg, P. Kazansky, 2002, Optics letters.

Form birefringence and negative index change created by femtosecond direct writing in transparent materials.

P. Kazansky, E. Bricchi, B. Klappauf, 2004, Optics letters.