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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

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Strongly interacting dipolar-polaritons.

Itamar Rosenberg¹, Dror Liran¹, Yotam Mazuz-Harpaz¹

¹Racah Institute of Physics, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.

Science Advances

|October 23, 2018

Summary

We demonstrate electrically polarized exciton-polaritons, or dipolaritons, with significantly enhanced interaction strength. This breakthrough enables tunable, strong interactions for advanced quantum technologies.

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Area of Science:

Quantum physics
Condensed matter physics
Optoelectronics

Background:

Exciton-polaritons are hybrid light-matter quasiparticles formed from photons and electronic excitations.
Controlling exciton-polariton interactions is crucial for developing quantum devices.
Existing methods offer limited control over interaction strength and tunability.

Purpose of the Study:

To demonstrate a novel system of electrically polarized exciton-polaritons (dipolaritons).
To investigate the enhancement of polariton-polariton interaction strength in these dipolaritons.
To explore the tunability and control of these enhanced interactions.

Main Methods:

Creation of optically guided exciton-polaritons.
Application of an external electric field for electrical polarization.
Measurement of polariton-polariton interaction strength under varying electric fields.

Main Results:

Achieved up to 200-fold enhancement in polariton-polariton interaction strength compared to unpolarized polaritons.
Demonstrated on/off switching and wide-range tuning of interaction strength via electric field.
Observed very long propagation distances for these guided dipolaritons.

Conclusions:

Electrically polarized dipolaritons offer significantly enhanced and tunable interactions.
This system provides a powerful platform for quantum simulation and quantum circuitry.
The findings open new avenues for exploring topological states and fundamental physics of polaritons.