Abstract—Branch-type polarization beam splitter (PBS) has not been received much attention recently due to its relatively long device-length (~100s µm). In this paper, we proposed a novel design based on the horizontal nanoplasmonic slot waveguide to address this problem. A detailed design principle and procedures to optimize the device parameters are clearly illustrated. Comprehensive numerical analysis is performed to investigate the performance of the devices using the finite-difference time-domain (FDTD) methods. By carefully designing the widths of the branches, we shows that more than 15dB extinction ratio can be achieved, using only 1μm active device length. Proof-of-concept devices are subsequently fabricated in a CMOS-compatible process and characterized, producing results that agree well with the numerical simulation.
Index Terms—Silicon photonics, plasmonics, polarization beam splitter
Y. Huang is with the Institute of Microelectronics, A*STAR (Agency for Science, Technology and Research), 11 Science Park Road, Science Park-II,117685 Singapore (e-mail: huangy@ime.a-star.edu.sg)
S. Zhang, S. Zhu, S. Liow and Patrick Lo are with the Institute of Microelectronics, A*STAR (Agency for Science, Technology and Research),11 Science Park Road, Science Park-II, 117685 Singapore.
Soham. S and M. Hong are with Department of Electrical and Computer Engineering, National University of Singapore, Singapore
Cite: Ying Huang, Hui Juan Zhang, Saha Soham S., Shiyang Zhu, Tsung-Yang Liow, Minghui Hong, and Patrick Lo G. Q., "Proposal of an Ultra-Compact Branch-Type Plasmonic Polarization Beam Splitter (PBS)," International Journal of Information and Electronics Engineering vol. 2, no. 6, pp. 862-864, 2012.