Dichroic Bragg reflectors based on birefringent porous silicon

J Diener, N Kunzner, D Kovalev, E Gross, V Y Timoshenko, G Polisski, F Koch

Research output: Contribution to journalArticlepeer-review

54 Citations (Scopus)

Abstract

Multilayers of anisotropically nanostructured silicon (Si) have been fabricated and studied by polarization-resolved reflection measurements. Alternating layers having different refractive indices exhibit additionally a strong in-plane anisotropy of their refractive index (birefringence). Therefore, a stack of layers, acting as a distributed Bragg reflector, has two distinct reflection bands, depending on the polarization of the incident linearly polarized light. This effect is governed by a three-dimensional (in-plane and in-depth) variation of the refractive index. These structures can yield optical effects which are difficult to achieve with conventional Bragg reflectors. (C) 2001 American Institute of Physics.
Original languageEnglish
Pages (from-to)3887-3889
Number of pages3
JournalApplied Physics Letters
Volume78
Issue number24
Publication statusPublished - 2001

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