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Fabrication of Silica Ultra High Quality Factor Microresonators

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Published on: July 2, 2012

Electrically tunable high Q-factor micro-ring resonator based on blue phase liquid crystal cladding.

Chun-Ta Wang, Yuan-Cheng Li, Jui-Hao Yu

|August 5, 2014

Summary

This summary is machine-generated.

This study presents an electrically tunable silicon nitride micro-ring resonator using polymer-stabilized blue phase liquid crystals. The device achieves a 0.45 nm tuning range with a sub-millisecond response time, demonstrating low optical loss.

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Area of Science:

Photonics and optical engineering
Materials science
Liquid crystal physics

Background:

Silicon nitride (SiN) micro-ring resonators are key components in integrated photonics.
Tuning the resonant wavelength of micro-ring resonators is crucial for tunable optical devices.
Liquid crystals offer tunable optical properties but often suffer from slow response times.

Purpose of the Study:

To demonstrate an electrically tunable SiN micro-ring resonator.
To utilize polymer-stabilized blue phase liquid crystals (PSBPLCs) for cladding.
To achieve fast optical tuning via the Kerr effect in liquid crystals.

Main Methods:

Fabrication of a SiN micro-ring resonator.
Cladding the resonator with PSBPLCs.
Applying an external vertical electric field to induce birefringence in PSBPLCs.
Measuring the resonant wavelength shift and response time.

Main Results:

Achieved an electrically tunable micro-ring resonator with PSBPLCs cladding.
Demonstrated a tuning range of 0.45 nm for TM polarized light at 150V.
Observed a sub-millisecond response time.
Maintained a high Q-factor exceeding 20,000 due to PSBPLC crystalline structure.

Conclusions:

The PSBPLC-clad SiN micro-ring resonator offers efficient electrical tuning.
The fast response time and low optical loss are promising for integrated photonic applications.
This approach provides a viable method for developing tunable optical filters and modulators.