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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

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Published on: April 4, 2017

Compact polarization rotator for silicon-based slot waveguide structures.

Jinbiao Xiao, Yin Xu, Jiayuan Wang

|May 3, 2014

Summary

This summary is machine-generated.

A novel compact polarization rotator (PR) for silicon slot waveguides utilizes liquid crystals (LCs) for efficient polarization conversion. This device achieves high performance over a short length, enabling compact photonic integrated circuits.

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Last Updated: Apr 30, 2026

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Area of Science:

Photonics and Optical Engineering
Materials Science (Liquid Crystals)
Semiconductor Nanophotonics

Background:

Silicon-based slot waveguides are crucial for integrated optics.
Efficient polarization control is essential for optical signal processing.
Liquid crystals (LCs) offer tunable anisotropic properties for optical applications.

Purpose of the Study:

To propose and numerically analyze a compact polarization rotator (PR).
To leverage the anisotropic properties of liquid crystals (LCs) in silicon slot waveguides.
To achieve efficient TE-to-TM and TM-to-TE polarization conversion.

Main Methods:

Design of a polarization rotator utilizing a silicon slot waveguide.
Integration of liquid crystals (LCs) within the slot and upper cladding regions.
Numerical simulation of eigenmodes and polarization conversion efficiency at 1.55 μm wavelength.

Main Results:

A polarization rotator of 11.3 μm length demonstrated.
Achieved extinction ratios (ER) of 12.6 dB (TE-to-TM) and 11.5 dB (TM-to-TE).
Optical bandwidths of ~64 nm (TE-to-TM) and ~29 nm (TM-to-TE) for specified ER.

Conclusions:

The proposed LC-filled silicon slot waveguide PR offers efficient polarization rotation in a compact footprint.
High modal hybridness due to LC anisotropy enables short-length polarization conversion.
The device shows potential for integrated photonic applications requiring precise polarization control.