Copper nanorod array assisted silicon waveguide polarization beam splitter

Sangsik Kim, Minghao Qi

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


We present the design of a three-dimensional (3D) polarization beam splitter (PBS) with a copper nanorod array placed between two silicon waveguides. The localized surface plasmon resonance (LSPR) of a metal nanorod array selectively cross-couples transverse electric (TE) mode to the coupler waveguide, while transverse magnetic (TM) mode passes through the original input waveguide without coupling. An ultra-compact and broadband PBS compared to all-dielectric devices is achieved with the LSPR. The output ports of waveguides are designed to support either TM or TE mode only to enhance the extinction ratios. Compared to silver, copper is fully compatible with complementary metal-oxide-semiconductor (CMOS) technology.

Original languageEnglish
Pages (from-to)9508-9516
Number of pages9
JournalOptics Express
Issue number8
StatePublished - Apr 21 2014


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