Title :
A Compact Hybrid Plasmonic Polarization Rotator for Silicon-Based Slot Waveguides
Author :
Yin Xu ; Jinbiao Xiao ; Xiaohan Sun
Author_Institution :
Nat. Res. Center for Opt. Sensing Commun. Integrated Networking, Southeast Univ., Nanjing, China
Abstract :
A compact polarization rotator (PR) for silicon-based slot waveguides is proposed, where a metal strip of aluminum (Al) is embedded in its upper-claddings. With the features of asymmetric hybrid plasmonic waveguide induced by the metal strip, an optimal optical axis rotation angle of 45° is realized, leading to high polarization conversion efficiency (PCE). The numerical results show that a PR of 11.6 μm in length at the wavelength of 1.55 μm is achieved with the PCE and insertion loss of 97.6% and 0.86 dB for TM-to-TE conversion, respectively. In addition, fabrication tolerances to the structural parameters are investigated and field evolution along the propagation distance through the PR is demonstrated.
Keywords :
aluminium; claddings; integrated optics; light polarisation; light propagation; optical fabrication; optical losses; optical polarisers; optical rotation; optical waveguides; plasmonics; silicon; Al; PCE; PR; Si; TM-to-TE conversion; aluminum; asymmetric hybrid plasmonic waveguide; compact hybrid plasmonic polarization rotator; fabrication tolerances; field evolution; insertion loss; loss 0.86 dB; metal strip; optimal optical axis rotation angle; polarization conversion efficiency; propagation distance; silicon-based slot waveguides; size 11.6 mum; structural parameters; upper-claddings; wavelength 1.55 mum; Indexes; Metals; Optical polarization; Optical waveguides; Optimized production technology; Plasmons; Strips; Integrated optical devices; polarization rotators; slot waveguides;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2329021
