Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Photoluminescence: Fluorescence and Phosphorescence

Photoluminescence: Fluorescence and Phosphorescence

Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...

$Interference and Diffraction$ 02:18

Interference and Diffraction

Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.

Photoelectric Effect

Photoelectric Effect

When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...

The de Broglie Wavelength

The de Broglie Wavelength

In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...

Carrier Generation and Recombination

Carrier Generation and Recombination

Carrier generation is the process by which electron-hole pairs (EHPs) are created within the semiconductor. In direct-bandgap semiconductors, such as gallium arsenide (GaAs), this occurs efficiently when energy absorption prompts valence electrons to leap into the conduction band, leaving behind holes.
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Electronic Hong Ou Mandel interferences to unveil the 2/3 fractional quantum Hall edge channel dynamics.

Nature communications·2025

Same author

Coulomb Sensing of Single Ballistic Electrons.

Physical review letters·2025

Same author

On-Chip Quantum Sensing of Kondo Spins in a High-Mobility Quasi-One-Dimensional Nanoconstriction.

Nano letters·2025

Same author

Spin-photon entanglement with direct photon emission in the telecom C-band.

Nature communications·2024

Same author

Coherent light scattering from a telecom C-band quantum dot.

Nature communications·2023

Same author

Time-resolved Coulomb collision of single electrons.

Nature nanotechnology·2023

Search research articles

Related Experiment Video

Updated: May 24, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Indistinguishable entangled photons generated by a light-emitting diode.

R M Stevenson¹, C L Salter, J Nilsson

¹Toshiba Research Europe Limited, 208 Science Park, Cambridge CB4 0GZ, United Kingdom.

Physical Review Letters

|March 10, 2012

Summary

This summary is machine-generated.

Researchers demonstrated entangled and indistinguishable photons from a quantum dot, crucial for linear optical quantum computing. This work advances the development of photonic quantum technologies.

More Related Videos

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Local Field Fluorescence Microscopy: Imaging Cellular Signals in Intact Hearts

Local Field Fluorescence Microscopy: Imaging Cellular Signals in Intact Hearts

Published on: March 8, 2017

Related Experiment Videos

Last Updated: May 24, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Local Field Fluorescence Microscopy: Imaging Cellular Signals in Intact Hearts

Local Field Fluorescence Microscopy: Imaging Cellular Signals in Intact Hearts

Published on: March 8, 2017

Area of Science:

Quantum Information Science
Optics and Photonics
Solid-State Physics

Background:

Linear optical quantum computing utilizes photonic qubits for computation.
Entanglement is essential for achieving near-deterministic operations in photonic quantum computers.
Quantum dots (QDs) are promising sources for generating quantum states of light.

Purpose of the Study:

To investigate the interference and entanglement properties of photons emitted by a quantum dot (QD) embedded in a light-emitting diode (LED).
To assess the suitability of QD-based photon sources for linear optical quantum computing applications.

Main Methods:

Fabrication of a light-emitting diode (LED) incorporating a quantum dot (QD).
Generation and detection of simultaneously emitted photon pairs from the QD.
Measurement of two-photon interference (Hong-Ou-Mandel effect) to determine photon indistinguishability.
Quantification of entanglement fidelity for the generated photon pairs.

Main Results:

Demonstrated that simultaneously generated photon pairs from the QD are entangled.
Showed that these entangled photons are indistinguishable from subsequently generated photons.
Achieved an entanglement fidelity of 0.87.
Measured a two-photon-interference visibility of 0.60 ± 0.05, indicating high indistinguishability.

Conclusions:

The quantum dot in an LED is a viable source for entangled and indistinguishable photons, key requirements for linear optical quantum computing.
The measured entanglement fidelity and interference visibility support the potential of this system for quantum information processing.
Detector jitter currently limits interference visibility, suggesting that improvements in optical cavity designs and detection systems could further enhance performance.