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Updated: May 22, 2025

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

Published on: August 15, 2018

Polaritonic Fourier crystal.

Sergey G Menabde¹, Yongjun Lim², Kirill Voronin^3,4

¹School of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Korea.

Nature Communications

|March 15, 2025

Summary

This summary is machine-generated.

We introduce a polaritonic Fourier crystal, a new type of nanostructure that minimizes scattering loss. This approach enables enhanced light-matter interactions and precise control of light at the nanoscale.

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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

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Published on: November 30, 2012

Area of Science:

Condensed matter physics
Nanophotonics
Materials science

Background:

Polaritonic crystals enable subdiffractional light manipulation and enhanced light-matter interactions.
Van der Waals materials offer extreme field confinement and long polariton lifetimes.
Conventional nanostructures suffer from scattering loss at material edges, hindering polaritonic crystal fabrication.

Purpose of the Study:

To introduce a novel polaritonic Fourier crystal concept.
To overcome scattering losses in polaritonic nanostructures.
To demonstrate a new paradigm for functional polaritonic crystals.

Main Methods:

Harmonic modulation of polariton momentum in a pristine polaritonic waveguide.
Utilizing hexagonal boron nitride (hBN) as the material.
Employing near-field imaging for band structure analysis.

Main Results:

Revealed a well-defined band structure of phonon-polaritons in the Fourier crystal.
Observed dominant excitation of the first-order Bloch mode.
Demonstrated a polaritonic bandgap in naturally abundant hBN.

Conclusions:

The polaritonic Fourier crystal offers a scattering-loss-minimized approach to polaritonic crystals.
This method facilitates enhanced light-matter interaction, dispersion engineering, and nanolight guiding.
Provides an alternative paradigm for creating functional polaritonic devices.