Giant birefringence and dichroism induced by ultrafast laser pulses in hydrogenated amorphous silicon

Rokas Drevinskas, Martynas Beresna, Mindaugas Gecevičius, Mark Khenkin, Andrey G. Kazanskii, Ieva Matulaitiene, Gediminas Niaura, Oleg I. Konkov, Eugene I. Terukov, Yu P. Svirko, Peter G. Kazansky

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

A femto- and picosecond laser assisted periodic nanostructuring of hydrogenated amorphous silicon (a-Si:H) is demonstrated. The grating structure with the subwavelength modulation of refractive index shows form birefringence (Δn -0.6) which is two orders of magnitude higher than commonly observed in uniaxial crystals and femtosecond laser nanostructured silica glass. The laser-induced giant birefringence and dichroism in a-Si:H film introduce extra dimensions to the polarization sensitive laser writing with applications that include data storage, security marking, and flat optics.

Original languageEnglish
Article number171106
JournalApplied Physics Letters
Volume106
Issue number17
DOIs
StatePublished - 27 Apr 2015
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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