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Room-Temperature Exciton-Polariton-Driven Self-Phase Modulation in Planar Perovskite Waveguides.

Nikita V Glebov^1,2, Mikhail A Masharin², Alexei Yulin¹

¹School of Physics and Engineering, ITMO University, St. Petersburg 197101, Russia.

|April 1, 2025

Summary

Exciton-polaritons in perovskite waveguides exhibit strong nonlinear optical effects. This study reveals their potential for ultrafast all-optical switching and soliton formation in on-chip photonic devices.

Keywords:

exciton-polariton group velocity dispersion halide perovskite nanoimprint lithography nonlinear optical waveguide self-phase modulation soliton

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Area of Science:

Photonics
Materials Science
Quantum Optics

Background:

Optical nonlinearities are essential for controlling light with light in photonic technologies.
Exciton-polaritons, formed by strong light-matter coupling, offer a unique combination of photonic coherence and excitonic nonlinearity.
Halide perovskites are promising materials for polaritonics due to their accessible operating temperatures and fabrication.

Purpose of the Study:

To investigate the nonlinear self-action of ultrashort polaritonic pulses in MAPbBr3 perovskite slab waveguides.
To explore the spectral evolution of these pulses under varying energy and frequency conditions.
To understand the fundamental mechanisms driving nonlinear pulse dynamics, including soliton and shock wave formation.

Main Methods:

Experimental observation of ultrashort polaritonic pulse propagation in planar perovskite waveguides.
Tuning of input pulse energy and central frequency to control nonlinear evolution.
Theoretical modeling to complement experimental findings and analyze temporal pulse dynamics.

Main Results:

Observed diverse spectral evolutions including peak shifts, narrowing, and splitting.
Demonstrated nonlinear effects driven by self-phase modulation, group velocity dispersion, and self-steepening.
Theoretically confirmed the transition from optical soliton formation to shock wave generation.

Conclusions:

Perovskite-based polaritonic systems exhibit significant ultrafast nonlinear optical properties.
These findings are a crucial advancement for developing on-chip ultrafast nonlinear polaritonics.
The demonstrated control over pulse dynamics highlights the potential of perovskites in future photonic technologies.