Design of a Broadband Polarization Splitter Based on Anisotropy-Engineered Tilted Subwavelength Gratings

Autor: Alaine Herrero-Bermello, Robert Halir, Alejandro Ortega-Moñux, José Manuel Luque-González, Pavel Cheben, Aitor V. Velasco
Přispěvatelé: Ministerio de Ciencia e Innovación (España), Comunidad de Madrid, European Commission, Herrero-Bermello, Alaine [0000-0001-7842-5007], Velasco, Aitor V. [0000-0001-7729-8595], Ortega-Moñux, Alejandro [0000-0001-8313-6381], Halir, Robert [/0000-0002-5560-3189], Herrero-Bermello, Alaine, Velasco, Aitor V., Ortega-Moñux, Alejandro, Halir, Robert
Rok vydání: 2019
Předmět:
lcsh:Applied optics. Photonics
Silicon-on-insulator (SOI)
Materials science
polarization beam splitter (PBS)
Physics::Optics
Subwavelength grating (SWG)
02 engineering and technology
Grating
01 natural sciences
010309 optics
Optics
0103 physical sciences
lcsh:QC350-467
Electrical and Electronic Engineering
Anisotropy
sub-wavelength grating (SWG)
multimode interference coupler (MMI)
Birefringence
Extinction ratio
business.industry
Orthogonal polarization spectral imaging
anisotropy engineering
Finite-difference time-domain method
lcsh:TA1501-1820
Multimode interference coupler (MMI)
021001 nanoscience & nanotechnology
Polarization (waves)
Atomic and Molecular Physics
and Optics
Photonics
silicon-on-insulator (SOI)
0210 nano-technology
business
Anisotropy engineering
lcsh:Optics. Light
Polarization beam splitter (PBS)
Zdroj: IEEE Photonics Journal, Vol 11, Iss 3, Pp 1-8 (2019)
Digital.CSIC. Repositorio Institucional del CSIC
instname
ISSN: 1943-0647
2016-8071
DOI: 10.1109/jphot.2019.2912335
Popis: Polarization management is of paramount importance in integrated optics, particularly for highly birefringent photonic platforms such as silicon-on-insulator. In this paper, we present a polarization beam splitter based on amultimode interference coupler incorporating tilted subwavelength gratings. The tilt provides accurate control of the structural anisotropy and enables independent selection of the beat length for two orthogonal polarization states. As a result, device length is reduced to less than 100 μm while simultaneously achieving broadband operation through subwavelength grating dispersion engineering. Insertion losses below 1 dB and an extinction ratio higher than 20 dB are demonstrated through three-dimensional FDTD simulation in a 131-nm bandwidth.
This work was supported in part by the Spanish Ministry of Science, Innovation and Universities under Grants TEC2016-80718-R, TEC2015- 71127-C2-1-R (FPU scholarship 16/06762), and IJCI-2016-30484; in part by the Community of Madrid under Grant S2018/NMT-4326, and in part by the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie under Grant 734331.
Databáze: OpenAIRE
Externí odkaz: