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Related Experiment Video

Updated: Jun 13, 2026

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

Thermooptic deflection and switching in glass.

M Haruna¹, J Koyama

¹Osaka University, Faculty of Engineering, Electronics Department, 2-1 Yamada-Oka, Suita, Osaka 565, Japan.

|April 17, 2010

Summary

New active optical devices in glass utilize the thermooptic effect for light manipulation. These devices, including deflectors and switches, demonstrate fast switching speeds with low power consumption.

Area of Science:

Optoelectronics
Materials Science

Background:

Active optical devices are crucial for light manipulation.
The thermooptic effect, based on refractive index changes with temperature, offers a mechanism for optical control.

Purpose of the Study:

To propose and demonstrate new active optical devices in glass using the thermooptic effect.
To investigate light deflection and switching capabilities.

Main Methods:

Developing active optical devices in glass.
Utilizing a small film heater deposited on the glass surface to induce thermooptic effects.
Fabricating thermooptic waveguide switches via ion-exchange techniques.

Main Results:

Demonstrated novel active optical devices, including deflectors and modulators/switches.

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Last Updated: Jun 13, 2026

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

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Published on: October 31, 2019

Cooling Rate Dependent Ellipsometry Measurements to Determine the Dynamics of Thin Glassy Films

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Published on: January 26, 2016

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

Achieved thermally induced index changes for light deflection and switching by applying voltage to film heaters.

Thermooptic waveguide switches exhibited a switching speed of approximately 1 millisecond with 0.5 W of driving electric power.

Conclusions:

New types of active optical devices in glass based on the thermooptic effect are feasible.
The demonstrated devices offer efficient light deflection and switching capabilities.
The technology shows promise for applications requiring fast optical switching with low power consumption.