# Dye-doped dual-frequency nematic cells as fast-switching polarization-independent shutters

## TL;DR

This paper introduces a fast, polarization-independent optical shutter using dual-frequency nematic cells doped with dye, achieving sub-millisecond switching speeds suitable for various electro-optical applications.

## Contribution

It demonstrates a novel dual-frequency nematic cell design with dye doping that enables rapid, polarization-independent switching with enhanced speed through high-amplitude voltage pulses.

## Key findings

- Switching time under 1 millisecond.
- Polarization independence achieved.
- Effective use of high-amplitude voltage pulses.

## Abstract

We present polarization-independent optical shutters with a sub-millisecond switching time. The approach utilizes dual-frequency nematics doped with a dichroic dye. Two nematic cells with orthogonal alignment are driven simultaneously by a low-frequency or high-frequency electric field to switch the shutter either into a transparent or a light-absorbing state. The switching speed is accelerated via special short pulses of high amplitude voltage. The approach can be used in a variety of electro-optical devices.

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Source: https://tomesphere.com/paper/1901.00473