Designing Single-Photon Sources: Towards Unity

Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

64 Downloads (Pure)

Abstract

A key building block within optical quantum information technology is the single-photon source. The key figures of merit are the efficiency, defined as the number of photons detected by the collection optics per trigger, as well as the indistinguishability describing the coherence properties of the emitted photons. Spontaneous parametric down-conversion (SPDC) has been the main workhorse for generating single photons within quantum optics for many years; however SPDC is inherently probabilistic limiting the number of photons involved in an experiment to a handful. Recently, the semiconductor quantum dot (QD) has emerged as an alternative to SPDC. By integrating the QD into a microstructure, the light emission can be controlled and extraction efficiency of around 0.7 [1,2] have been achieved. Furthermore, using resonant excitation and careful control of the neighbouring charge environment, indistinguishability up to 0.99 [2,3] has been demonstrated. However, future progress within QD-based single-photon sources will require the combination of high efficiency with high indistinguishability. In this presentation, I will discuss the physical limitations of present-day design schemes, which must be overcome to combine near-unity efficiency and indistinguishability. I will discuss new promising QD-based design schemes and I will discuss the challenges ahead.
Original languageEnglish
Publication date2018
Number of pages1
Publication statusPublished - 2018
Event6th workshop on “Engineering of Quantum Emitter Properties - Sapienza University of Rome, Rome, Italy
Duration: 5 Dec 20187 Dec 2018
http://eqep-workshop.eu/

Workshop

Workshop6th workshop on “Engineering of Quantum Emitter Properties
LocationSapienza University of Rome
CountryItaly
CityRome
Period05/12/201807/12/2018
Internet address

Cite this

Gregersen, N., Denning, E. V., & Mørk, J. (2018). Designing Single-Photon Sources: Towards Unity. Abstract from 6th workshop on “Engineering of Quantum Emitter Properties, Rome, Italy.
Gregersen, Niels ; Denning, Emil Vosmar ; Mørk, Jesper. / Designing Single-Photon Sources: Towards Unity. Abstract from 6th workshop on “Engineering of Quantum Emitter Properties, Rome, Italy.1 p.
@conference{55cc6ca0e6a5400e883e7689e3b754d9,
title = "Designing Single-Photon Sources: Towards Unity",
abstract = "A key building block within optical quantum information technology is the single-photon source. The key figures of merit are the efficiency, defined as the number of photons detected by the collection optics per trigger, as well as the indistinguishability describing the coherence properties of the emitted photons. Spontaneous parametric down-conversion (SPDC) has been the main workhorse for generating single photons within quantum optics for many years; however SPDC is inherently probabilistic limiting the number of photons involved in an experiment to a handful. Recently, the semiconductor quantum dot (QD) has emerged as an alternative to SPDC. By integrating the QD into a microstructure, the light emission can be controlled and extraction efficiency of around 0.7 [1,2] have been achieved. Furthermore, using resonant excitation and careful control of the neighbouring charge environment, indistinguishability up to 0.99 [2,3] has been demonstrated. However, future progress within QD-based single-photon sources will require the combination of high efficiency with high indistinguishability. In this presentation, I will discuss the physical limitations of present-day design schemes, which must be overcome to combine near-unity efficiency and indistinguishability. I will discuss new promising QD-based design schemes and I will discuss the challenges ahead.",
author = "Niels Gregersen and Denning, {Emil Vosmar} and Jesper M{\o}rk",
year = "2018",
language = "English",
note = "6th workshop on “Engineering of Quantum Emitter Properties ; Conference date: 05-12-2018 Through 07-12-2018",
url = "http://eqep-workshop.eu/",

}

Gregersen, N, Denning, EV & Mørk, J 2018, 'Designing Single-Photon Sources: Towards Unity' 6th workshop on “Engineering of Quantum Emitter Properties, Rome, Italy, 05/12/2018 - 07/12/2018, .

Designing Single-Photon Sources: Towards Unity. / Gregersen, Niels; Denning, Emil Vosmar; Mørk, Jesper.

2018. Abstract from 6th workshop on “Engineering of Quantum Emitter Properties, Rome, Italy.

Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

TY - ABST

T1 - Designing Single-Photon Sources: Towards Unity

AU - Gregersen, Niels

AU - Denning, Emil Vosmar

AU - Mørk, Jesper

PY - 2018

Y1 - 2018

N2 - A key building block within optical quantum information technology is the single-photon source. The key figures of merit are the efficiency, defined as the number of photons detected by the collection optics per trigger, as well as the indistinguishability describing the coherence properties of the emitted photons. Spontaneous parametric down-conversion (SPDC) has been the main workhorse for generating single photons within quantum optics for many years; however SPDC is inherently probabilistic limiting the number of photons involved in an experiment to a handful. Recently, the semiconductor quantum dot (QD) has emerged as an alternative to SPDC. By integrating the QD into a microstructure, the light emission can be controlled and extraction efficiency of around 0.7 [1,2] have been achieved. Furthermore, using resonant excitation and careful control of the neighbouring charge environment, indistinguishability up to 0.99 [2,3] has been demonstrated. However, future progress within QD-based single-photon sources will require the combination of high efficiency with high indistinguishability. In this presentation, I will discuss the physical limitations of present-day design schemes, which must be overcome to combine near-unity efficiency and indistinguishability. I will discuss new promising QD-based design schemes and I will discuss the challenges ahead.

AB - A key building block within optical quantum information technology is the single-photon source. The key figures of merit are the efficiency, defined as the number of photons detected by the collection optics per trigger, as well as the indistinguishability describing the coherence properties of the emitted photons. Spontaneous parametric down-conversion (SPDC) has been the main workhorse for generating single photons within quantum optics for many years; however SPDC is inherently probabilistic limiting the number of photons involved in an experiment to a handful. Recently, the semiconductor quantum dot (QD) has emerged as an alternative to SPDC. By integrating the QD into a microstructure, the light emission can be controlled and extraction efficiency of around 0.7 [1,2] have been achieved. Furthermore, using resonant excitation and careful control of the neighbouring charge environment, indistinguishability up to 0.99 [2,3] has been demonstrated. However, future progress within QD-based single-photon sources will require the combination of high efficiency with high indistinguishability. In this presentation, I will discuss the physical limitations of present-day design schemes, which must be overcome to combine near-unity efficiency and indistinguishability. I will discuss new promising QD-based design schemes and I will discuss the challenges ahead.

M3 - Conference abstract for conference

ER -

Gregersen N, Denning EV, Mørk J. Designing Single-Photon Sources: Towards Unity. 2018. Abstract from 6th workshop on “Engineering of Quantum Emitter Properties, Rome, Italy.