Sub-μm2 power splitters by using silicon hybrid plasmonic waveguides

• Nano-scale power splitters based on Si hybrid plasmonic waveguides are designed by utilizing the multimode interference (MMI) effect as well as Y-branch structure. A three-dimensional finite-difference time-domain method is used for simulating the light propagation and optimizing the structural parameters. The designed 1×2 50:50 MMI power splitter has a nano-scale size of only 650 nm×530 nm. The designed Y-branch power splitter is also very small, i.e., about 900 nm×600 nm. The fabrication tolerance is also analyzed and it is shown that the tolerance of the waveguide width is much larger than±50 nm. The power splitter has a very broad band of over 500 nm. In order to achieve a variable power splitting ratio, a 2×2 two-mode interference coupler and an asymmetric Y-branch are used and the corresponding power splitting ratio can be tuned in the range of 97.1%:2.9%-1.7%:98.3% and 84%:16%-16%:84%, respectively. Finally a 1×4 power splitter with a device footprint of 1.9 μm×2.6 μm is also presented using cascaded Y-branches.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Annan materialteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Other Materials Engineering (hsv//eng)

Nyckelord

Broad bands

Fabrication tolerances

Multi-mode interference

Nano scale

Plasmonic waveguides

Power splitters

Power splitting ratio

Structural parameter

Two-mode interference

Variable power

Waveguide widths

Y-branch

Finite difference time domain method

Integrated optics

Nanostructured materials

Optical beam splitters

Plasmons

Waveguides

article

computer aided design

computer simulation

equipment

equipment design

instrumentation

light

radiation scattering

refractometry

surface plasmon resonance

theoretical model

Computer-Aided Design

Equipment Failure Analysis

Models

Theoretical

Scattering

Radiation

Publikations- och innehållstyp

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