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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

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Published on: August 2, 2019

Resonant inelastic tunneling using multiple metallic quantum wells.

Yiyun Zhang^1,2,3, Dominic Lepage⁴, Yiming Feng^1,2,3

¹Interdisciplinary Center for Quantum Information, State Key Laboratory of Extreme Photonics and Instrumentation, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 310027, China.

Nanophotonics (Berlin, Germany)

|December 5, 2024

Summary

This summary is machine-generated.

This study introduces a new method using multiple metallic quantum wells to boost photon emission from inelastic electron tunneling (IET) devices. This breakthrough enhances light source efficiency and power for practical applications.

Keywords:

inelastic electron tunneling internal quantum efficiency metallic quantum wells photon-emission power

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Published on: January 19, 2018

Area of Science:

Solid State Physics
Quantum Optics
Nanotechnology

Background:

Inelastic electron tunneling (IET) is promising for ultra-fast light sources.
Current IET devices suffer from low photon-emission power and efficiency due to elastic tunneling.
Existing resonant tunneling approaches have not resolved the efficiency-power trade-off.

Purpose of the Study:

To overcome limitations in IET-based light sources.
To enhance photon-emission efficiency and power in tunnel nanojunctions.
To enable practical implementation of IET light sources.

Main Methods:

Utilized multiple metallic quantum wells to achieve stronger resonant tunneling enhancement.
Investigated the impact of quantum well structures on electron tunneling dynamics.
Measured internal quantum efficiency and photon-emission power.

Main Results:

Achieved near-unity internal quantum efficiency (∼1).
Reached high photon-emission power (∼0.8 µW/µm²).
Demonstrated applicability across a wide range of electronic lifetimes (10 fs to 100 fs).

Conclusions:

The novel approach significantly enhances IET light source performance.
Multiple metallic quantum wells effectively address previous efficiency and power limitations.
This work advances the practical realization of IET-based ultra-fast integrated light sources.