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Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

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Double-helix chiral fibers.

Victor I Kopp¹, Azriel Z Genack

¹Chiral Photonics, Inc., Clifton, New Jersey 07012, USA. vickopp@chiraloptics.com

|November 1, 2003

Summary

This summary is machine-generated.

A novel chiral fiber with double-helix symmetry creates a polarization-selective photonic stop band. This band, tunable with twisting, shows unique scattering properties not predicted by simple models.

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Area of Science:

Photonics
Materials Science
Optics

Background:

Chiral photonic structures exhibit unique light-matter interactions.
Photonic stop bands selectively block specific wavelengths of light.
Understanding polarization-dependent phenomena is crucial for optical device development.

Purpose of the Study:

To demonstrate a polarization-selective photonic stop band in a novel chiral fiber.
To investigate the tunability of this stop band using mechanical manipulation.
To explore the frequency-dependent behavior and scattering properties of the chiral fiber.

Main Methods:

Fabrication of a double-helix symmetric chiral fiber.
Characterization of the photonic stop band for circularly polarized light.
Application of controlled twisting to induce localized modes.
Comparison of experimental results with one-dimensional simulations.

Main Results:

A polarization-selective photonic stop band was successfully demonstrated, matching the handedness of the chiral structure.
The stop band's center wavelength was found to be equal to the fiber pitch.
Twisting the fiber created a tunable localized mode within the stop band.
At higher frequencies, a broad, polarization-selective scattering band emerged, not predicted by 1D models.

Conclusions:

The chiral fiber structure effectively supports polarization-selective photonic stop bands.
Mechanical twisting offers a method for tuning optical properties in chiral fibers.
The observed high-frequency scattering band indicates complex optical phenomena beyond simple 1D models, warranting further investigation.