Abstract
An ultra-compact polarization splitter based on asymmetric metal/multi-insulator directional coupler is proposed and investigated analytically and numerically. A large modal birefringence of > 0.69 is estimated, enabling a clean polarization selective directional coupling within 5.6 μm. The insertion loss of <-0.32 dB and the splitting and extinction ratios of >20 dB are predicted. Modified coupled-mode equations for a coupled lossy waveguide system are also presented.
Original language | English |
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Article number | 6111439 |
Pages (from-to) | 458-460 |
Number of pages | 3 |
Journal | IEEE Photonics Technology Letters |
Volume | 24 |
Issue number | 6 |
DOIs | |
State | Published - 2012 |
Keywords
- Coupled-mode analysis
- plasmonic waveguides
- polarization splitters
- surface plasmons