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MOS Capacitor01:25

MOS Capacitor

A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...

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Related Experiment Video

Updated: Jun 20, 2026

An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
10:33

An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation

Published on: February 27, 2019

Ferroelectric-liquid-crystal/silicon-integrated-circuit spatial light modulator.

L K Cotter, T J Drabik, R J Dillon

    Optics Letters
    |September 18, 2009
    PubMed
    Summary
    This summary is machine-generated.

    We developed a spatial light modulator (SLM) using ferroelectric liquid crystals on silicon. This device achieves high frame rates and contrast ratios for advanced optical applications.

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    Area of Science:

    • Optoelectronics
    • Materials Science
    • Integrated Circuits

    Background:

    • Spatial light modulators (SLMs) are crucial for optical systems.
    • Integrating light-modulating layers with silicon circuitry offers performance advantages.

    Purpose of the Study:

    • To design and characterize a novel ferroelectric liquid crystal (FLC) on silicon spatial light modulator (SLM).
    • To evaluate the performance of different addressing schemes for SLM arrays.

    Main Methods:

    • Fabrication of an SLM with a ferroelectric-liquid-crystal layer on a silicon integrated circuit.
    • Implementation of two distinct electrically addressed arrays: a 1x128 linear array (shift register addressing) and a 64x64 square array (static random access memory addressing).
    • Characterization of addressing capabilities and optical performance.

    Main Results:

    • The SLM achieved high frame rates of up to 4.5 kHz.
    • Single-element intensity contrast ratios of 12:1 were obtained.
    • Demonstrated feasibility of integrating FLCs with silicon ICs for SLM applications.

    Conclusions:

    • The developed FLC-on-silicon SLM demonstrates high-speed addressing and good contrast.
    • The integration of FLCs with silicon integrated circuits is a viable approach for advanced SLM development.
    • This technology holds potential for applications requiring fast and high-contrast light modulation.