Related Experiment Video
Updated: Jun 19, 2026
10:33
An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
Published on: February 27, 2019
High-speed liquid-crystal-on-silicon spatial light modulators using high-voltage circuitry.
Optics Letters
|October 28, 2009
Summary
High-voltage circuits enable two new liquid-crystal-on-silicon spatial light modulators to switch rapidly. These devices achieve fast switching times and high contrast ratios for advanced optical applications.
Area of Science:
- Optoelectronics
- Materials Science
Background:
- Spatial light modulators (SLMs) are crucial for optical systems.
- High-speed SLMs are needed for applications like adaptive optics and optical computing.
- Chiral smectic liquid crystals offer potential for fast switching but require specialized driving circuitry.
Purpose of the Study:
- To describe two novel high-speed liquid-crystal-on-silicon (LCoS) spatial light modulators.
- To present the high-voltage circuitry developed for driving these LCoS SLMs.
- To characterize the switching performance and contrast ratios of the developed devices.
Main Methods:
- Development of high-voltage driver circuits capable of delivering 30 V and 15 V.
- Integration of these circuits with chiral smectic liquid-crystal SLMs.
- Measurement of 10-90% switching times and ON/OFF contrast ratios.
Main Results:
- Achieved 10-90% switching times of 30 microseconds (µs) with 30 V and 50 µs with 15 V.
- Demonstrated ON/OFF contrast ratios of 13:1 and 15:1 for the respective devices.
- Successfully operated chiral smectic LCoS SLMs at high speeds using the developed circuitry.
Conclusions:
- The developed high-voltage circuitry effectively drives chiral smectic LCoS SLMs at high speeds.
- The LCoS SLMs exhibit promising performance metrics for demanding optical applications.
- This work contributes to the advancement of high-performance spatial light modulation technology.
