Planar silicon-based light polarizers

J Diener, N Kunzer, E Gross, D Kovalev, M Fujii

Research output: Contribution to journalArticlepeer-review

16 Citations (SciVal)


Silicon-based thin-film polarizers operating in the visible and near-infraed spectral range are fabricated by electrochemical etching of bulk silicon wafers. Anisotropically etched (110) porous silicon layers exhibit a strong in-plane anisotropy of the refractive index. Stackes of alternating layers with different mean refractive indices and thicknesses act as dichroic Bragg reflectors or microcavities, respectively., Both structures have two distinct reflection and transmission bands depending on the polarization of the incident linearly polarized light. Planar polarizers are realized through the combination, in one structure, of a dichroic reflector with. either a second reflector or a microcavity with different spectral responses. (C) 2004 Optical Society of America
Original languageEnglish
Pages (from-to)195-197
Number of pages3
JournalOptics Letters
Issue number2
Publication statusPublished - 2004


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