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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

Multiple frequency resolution using stressed liquid crystal as a Fourier transform spectrometer.

Leslie Shelton¹, John McMurdy, Gregory Crawford

¹Department of Physics, Brown University, Providence, Rhode Island 02912, USA. Leslie Shelton@Brown.Edu

|September 22, 2009

Summary

Stressed liquid crystals function as phase modulators in Fourier transform spectroscopy. This study examines their performance using dual-wavelength light and varied intensity, optimizing spectroscopic applications.

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Area of Science:

Optics and Photonics
Materials Science

Background:

Liquid crystals (LCs) are anisotropic materials with tunable optical properties.
Phase modulation is crucial for various spectroscopic techniques, including Fourier transform spectroscopy (FTS).

Purpose of the Study:

To investigate the efficacy of stressed liquid crystals as phase modulating elements.
To evaluate the impact of varying light intensity and dual-wavelength sources on LC phase modulation performance within FTS.

Main Methods:

Utilizing stressed liquid crystal cells as phase modulators.
Employing two-wavelength light sources with controlled intensity variations.
Integrating the LC phase modulator into a Fourier transform spectroscopy setup.

Main Results:

Demonstrated the capability of stressed LCs to perform phase modulation in FTS.
Quantified the influence of light intensity on the phase modulation characteristics.
Observed the effect of using two distinct wavelengths on the modulation fidelity and spectral output.

Conclusions:

Stressed liquid crystals show promise as effective phase modulating elements for Fourier transform spectroscopy.
Optimizing intensity and wavelength selection can enhance the performance of LC-based phase modulators.
This research contributes to the development of advanced optical components for spectroscopic instrumentation.