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Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
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Conical Diffraction and Composite Lieb Bosons in Photonic Lattices
Falko Diebel1, Daniel Leykam2,3, Sebastian Kroesen1
1Institut für Angewandte Physik and Center for Nonlinear Science (CeNoS), Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany.
Physical Review Letters
|May 21, 2016
Summary
We experimentally show unique wave dynamics in a photonic Lieb lattice. Integer pseudospin states exhibit distinct conical diffraction and generate higher-order optical vortices.
Area of Science:
- Optics and Photonics
- Condensed Matter Physics
Background:
- Pseudospin describes wave distribution across internal degrees of freedom like polarization or sublattices.
- Photonic lattices offer a platform to explore wave phenomena analogous to condensed matter systems.
Purpose of the Study:
- To experimentally demonstrate and explain wave dynamics in a photonic Lieb lattice.
- To investigate the unique properties of integer pseudospin states, specifically s=1 conical intersection.
Main Methods:
- Fabrication and characterization of a photonic Lieb lattice.
- Experimental observation of wave propagation and diffraction patterns.
- Analysis of pseudospin-dependent phenomena and optical vortex generation.
Main Results:
- Demonstration of integer pseudospin s=1 conical intersection in a photonic Lieb lattice.
- Observation of pseudospin-dependent conical diffraction.
- Experimental generation of higher-charged optical vortices from integer pseudospin states.
Conclusions:
- Integer pseudospin states in photonic Lieb lattices exhibit distinct wave dynamics.
- These findings open new avenues for controlling light and generating structured light fields.
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