Journal
OPTICS EXPRESS
Volume 22, Issue 8, Pages 9508-9516Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.22.009508
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Funding
- National Science Foundation [ECCS-0901383, CMMI-1120577]
- Defense Threat Reduction Agency (DTRA) [HDTRA1-07-C-0042, HDTRA1-10-1-0106]
- National Institute of Health [1R01RR026273-01]
- CAS International Collaboration and Innovation Program on High Mobility Materials Engineering
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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. (C) 2014 Optical Society of America
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