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Related Experiment Video

Updated: Jun 24, 2026

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Published on: May 29, 2018

Fourier transform spectroscopy using stressed liquid crystal.

John W McMurdy¹, Leslie J Shelton, Gregory P Crawford

¹Division of Engineering, Brown University, Providence, RI 02912, USA. john mcmurdy@brown.edu

|March 19, 2009

Summary

This summary is machine-generated.

Stressed Liquid Crystals (SLCs) enhance Fourier transform (FT) spectrometer resolution by increasing path lengths. This study quantifies spectral resolution using SLC phase modulators, achieving 60 nm resolution for a 100 micrometer thick cell.

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Area of Science:

Optics and Photonics
Spectroscopy
Materials Science

Background:

Fourier transform (FT) spectrometers require precise retardance elements for high spectral resolution.
Stressed Liquid Crystals (SLCs) offer potential as advanced retardance elements due to volume alignment.
Optimizing SLCs for FT spectroscopy can improve instrument performance and resolution.

Purpose of the Study:

To investigate the application of Stressed Liquid Crystals (SLCs) as single-panel retardance elements in FT spectrometers.
To characterize the relationship between transmission and shear in thick SLC cells.
To quantify the spectral resolution achieved using SLC phase modulators in FT spectrometer systems.

Main Methods:

Fabrication and characterization of thick Stressed Liquid Crystal (SLC) cells.
Measurement of transmission and shear properties of SLC cells.
Quantification of spectral resolution in single and double pass FT spectrometer configurations utilizing SLCs.

Main Results:

The relationship between transmission and shear for thick SLC cells was successfully characterized.
Spectral resolution was quantified for FT spectrometer systems employing SLC phase modulators.
A spectral resolution of 60 nm full width half maximum was achieved for a single frequency peak using a 100 micrometer thick SLC.

Conclusions:

Stressed Liquid Crystals (SLCs) are viable retardance elements for FT spectrometers.
Volume alignment in SLCs effectively increases retardance and enhances FT resolution.
The demonstrated spectral resolution indicates the potential of SLCs for advanced spectroscopic applications.