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A compact ultrabroadband polarization beam splitter utilizing a hybrid plasmonic Y-branch

A compact ultrabroadband polarization beam splitter utilizing a hybrid plasmonic Y-branch
A compact ultrabroadband polarization beam splitter utilizing a hybrid plasmonic Y-branch
A compact and ultrabroadband polarization beam splitter (PBS) utilizing a hybrid plasmonic Y-branch (HPYB) on a silicon-on-insulator (SOI) platform is proposed and numerically demonstrated. The HPYB consists of a vertical hybrid plasmonic waveguide (HPW) and a horizontal HPW formed by silicon (Si) and silver (Ag) strip waveguides sandwiched with a silicon dioxide (SiO2) layer, in which the vertical and horizontal hybrid plasmonic modes (HPMs) are excited by the input transverse electric (TE) and transverse magnetic (TM) modes, respectively. The HPMs are split into different ports and coupled back to TE and TM modes to implement the polarization splitting function. A simplified and compact HPYB is robust for the HPMs' generation. The structure is wavelength insensitive since the HPMs' excitation is weakly correlated to the optical wavelengths. The simulation results show that the HPYB-based PBS has a compact footprint of 5×1.8 µm2 and an ultralarge working bandwidth of 285nm, with the polarization crosstalk < -10 dB and the worst-case TE (TM) mode insertion loss of -1.53 (-2.35) dB. The device also exhibits a large fabrication tolerance of 210nm variation (from -100 to 110nm) to the waveguide width for both polarizations.
1943-0655
1-10
Hu, Ting
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Qiu, Haodong
1061098e-e16e-49ad-8068-26f68872db23
Zhang, Zecen
bfd08efc-a02b-4052-a9f7-134e20b902f7
Guo, Xin
53a4beb7-8d30-4edb-b409-d5477927fe58
Liu, Chongyang
28ec0e52-d3f6-4bc4-bce1-29d6842267df
Rouifed, Mohamed Said
c498264d-50f4-4003-9d18-b40f318160e2
Littlejohns, Callum
0fd6585d-030d-4d8f-a411-6fc03e083efa
Reed, Graham
ca08dd60-c072-4d7d-b254-75714d570139
Wang, Hong
dfd0ec4f-682a-4596-a0d1-171313cc5733
Hu, Ting
4dce8d60-2550-42b0-9535-1e49e504ffab
Qiu, Haodong
1061098e-e16e-49ad-8068-26f68872db23
Zhang, Zecen
bfd08efc-a02b-4052-a9f7-134e20b902f7
Guo, Xin
53a4beb7-8d30-4edb-b409-d5477927fe58
Liu, Chongyang
28ec0e52-d3f6-4bc4-bce1-29d6842267df
Rouifed, Mohamed Said
c498264d-50f4-4003-9d18-b40f318160e2
Littlejohns, Callum
0fd6585d-030d-4d8f-a411-6fc03e083efa
Reed, Graham
ca08dd60-c072-4d7d-b254-75714d570139
Wang, Hong
dfd0ec4f-682a-4596-a0d1-171313cc5733

Hu, Ting, Qiu, Haodong, Zhang, Zecen, Guo, Xin, Liu, Chongyang, Rouifed, Mohamed Said, Littlejohns, Callum, Reed, Graham and Wang, Hong (2016) A compact ultrabroadband polarization beam splitter utilizing a hybrid plasmonic Y-branch. IEEE Photonics Journal, 8, 1-10. (doi:10.1109/JPHOT.2016.2585113).

Record type: Article

Abstract

A compact and ultrabroadband polarization beam splitter (PBS) utilizing a hybrid plasmonic Y-branch (HPYB) on a silicon-on-insulator (SOI) platform is proposed and numerically demonstrated. The HPYB consists of a vertical hybrid plasmonic waveguide (HPW) and a horizontal HPW formed by silicon (Si) and silver (Ag) strip waveguides sandwiched with a silicon dioxide (SiO2) layer, in which the vertical and horizontal hybrid plasmonic modes (HPMs) are excited by the input transverse electric (TE) and transverse magnetic (TM) modes, respectively. The HPMs are split into different ports and coupled back to TE and TM modes to implement the polarization splitting function. A simplified and compact HPYB is robust for the HPMs' generation. The structure is wavelength insensitive since the HPMs' excitation is weakly correlated to the optical wavelengths. The simulation results show that the HPYB-based PBS has a compact footprint of 5×1.8 µm2 and an ultralarge working bandwidth of 285nm, with the polarization crosstalk < -10 dB and the worst-case TE (TM) mode insertion loss of -1.53 (-2.35) dB. The device also exhibits a large fabrication tolerance of 210nm variation (from -100 to 110nm) to the waveguide width for both polarizations.

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Accepted/In Press date: 22 June 2016
e-pub ahead of print date: 28 June 2016
Published date: August 2016
Organisations: Optoelectronics Research Centre

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Local EPrints ID: 400900
URI: https://eprints.soton.ac.uk/id/eprint/400900
ISSN: 1943-0655
PURE UUID: d52b9880-0a02-46ef-b6d1-6ece7e529a4e

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Date deposited: 29 Sep 2016 10:48
Last modified: 02 Dec 2019 19:56

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Contributors

Author: Ting Hu
Author: Haodong Qiu
Author: Zecen Zhang
Author: Xin Guo
Author: Chongyang Liu
Author: Mohamed Said Rouifed
Author: Callum Littlejohns
Author: Graham Reed
Author: Hong Wang

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