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Related Experiment Video

Updated: Jun 24, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Distributed feedback grating in liquid crystal waveguide: a novel approach.

Domenico Donisi¹, Rita Asquini, Antonio d'Alessandro

¹Department of Electronic Engineering, University of Rome Sapienza, Rome, Italy.

|April 1, 2009

Summary

This summary is machine-generated.

We developed a novel liquid crystal device for tunable optical feedback. This electro-optic device acts as a Bragg reflector, controlling light with voltage.

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Last Updated: Jun 24, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

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Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

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Area of Science:

Photonics
Materials Science
Liquid Crystal Technology

Background:

Distributed feedback devices are crucial for controlling light propagation.
Liquid crystals offer unique electro-optic properties for tunable photonic applications.

Purpose of the Study:

To design and numerically test a novel distributed feedback guided-wave device using liquid crystals.
To demonstrate voltage-tunable optical feedback and Bragg reflection in a simple liquid crystal geometry.

Main Methods:

Utilized electro-optic molecular reorientation in uniaxial nematic liquid crystals.
Designed a simple guided-wave device geometry.
Performed numerical simulations to test the device's performance.

Main Results:

Demonstrated an effective Bragg reflector functionality.
Achieved voltage-tunable resonance properties.
Validated the device design through numerical testing.

Conclusions:

The proposed liquid crystal device offers a simple and effective method for voltage-tunable optical feedback.
This work opens possibilities for novel tunable photonic devices based on liquid crystals.