Achromatic polarization rotator imprinted by ultrafast laser nanostructuring in glass

Desmarchelier, R., Lancry, M., Gecevičius, M., Beresna, M., Kazansky, P.G. and Poumellec, B. (2015) Achromatic polarization rotator imprinted by ultrafast laser nanostructuring in glass. Applied Physics Letters, 107 (18), 181111. (doi:10.1063/1.4934866).

Abstract

We demonstrate achromatic polarization rotators implemented by femtosecond laser assisted nanostructuring of silica glass. The rotation of polarization plane results from the chiral arrangement of optical axis embedded in the multi-layered stack of birefringent layers. In our experiments, we achieved rotation of 46.0 ± 0.6° and 93 ± 6° in the broad spectral range of 600-1600 nm, which can be extended even further up to 5 µm. These silica birefringent optical components exhibit advantages over liquid crystal polarizing devices or broadband crystalline waveplates, including large acceptance angle, high thermal stability, and high damage threshold.

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