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Related Experiment Video

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Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes

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Published on: November 16, 2018

Andreev Reflection in a Superconducting Light-Emitting Diode.

Dmitry Panna¹, Shlomi Bouscher¹, Krishna Balasubramanian¹

¹Department of Electrical Engineering , Technion , Haifa 32000 , Israel.

|October 24, 2018

Summary

Researchers achieved Cooper-pair injection into superconducting light-emitting diodes, enabling efficient quantum light sources. This breakthrough overcomes previous interface challenges for practical superconductor-semiconductor devices.

Keywords:

Andreev reflection LED Superconductors semiconductors

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Area of Science:

Condensed Matter Physics
Quantum Optics
Materials Science

Background:

Superconducting devices offer unique quantum properties.
Efficient light emission from superconductors is challenging due to interface requirements.
Previous attempts faced limitations in balancing electrical transparency and radiative efficiency.

Purpose of the Study:

To experimentally demonstrate Cooper-pair injection into a superconducting light-emitting diode.
To overcome the conflicting demands of electrically transparent interfaces and efficient radiative recombination.
To develop practical superconductor-semiconductor quantum light sources.

Main Methods:

Observation of Andreev reflection at the superconductor-semiconductor interface.
Fabrication and characterization of a superconducting light-emitting diode.
Comparison of experimental results with theoretical predictions of conductance and electroluminescence spectra.

Main Results:

Successful demonstration of Cooper-pair injection into the semiconductor.
Electroluminescence enhancement observed at the quasi-Fermi energy below the critical temperature (Tc).
Experimental data aligns well with theoretical models based on Cooper-pair injection.

Conclusions:

The study successfully demonstrates a method for Cooper-pair injection into superconducting light-emitting diodes.
The findings overcome key challenges for creating efficient superconductor-semiconductor quantum light sources.
This work lays the foundation for the development of practical quantum light sources based on superconducting materials.