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Single or Entangled Photon Source


25.08.2011 | Ref.Nr. 05128
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Physics&Engineering

Background
For high security quantum cryptography electrically triggered single or entangled photon sources are needed. In addition the mass market requires efficient, electrically driven, high-speed devices.

Technology
Common growth and processing techniques are used to fabricate single photon sources which either generate polarization entangled photon pairs or polarization controlled single photons. This offers the opportunity for quantum cryptography with single photons or entangled photon pairs. 

IP Rights
German Patent DE 102005057800 B4
European/ US/ Japanese Patent Application

Patent Owner

Technische Universität Berlin, Germany

Application Area:
Quantum cryptography
Development Stage: Lab Level
Schlagworte: Entangled photons, Photon pairs, Quantum Dots, Single photons,
Weitere Kategorien: Communication, Semiconductor, Physics & Engineering
Bild des Benutzers Dr. Kirk Haselton
Licensing Manager: Dr. Kirk Haselton
T +49 30 2125 4842
F +49 30 2125 4822
kirk.haselton@ipal.de
Suitable Industry: Security Industry, Communication, Information Technology
Benefits:

  • Choice of electrically triggered entangled or single photon source
  • Thermo-electrical cooling
  • Mass production possible

Photon Pair source


25.08.2011 | Ref.Nr. 08112
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Physics&Engineering

Figure showing a photon pair source (left) and the (111) substrate orientation (right) Background
For high security quantum cryptography electrically triggered single or entangled photon sources are needed. In addition the mass market requires efficient, electrically driven, high-speed devices. A single or entangled photon source allows to use common growth and processing techniques for fabrication.

Technology
We offer a method for producing a photon pair source, which generates entangled photon pairs. This method offers a minimization of the fine structure splitting in Quantum Dots (QDs) to nearly zero using (1,1,1)-orientated semiconductor substrates.

IP Rights
German Patent DE 102008036400 B3
European / Japanese/ Chinese/ Indian/ Korean Patent Application

Patent Owner
Technische Universität Berlin, Germany

Application Area:
Quantum cryptography
Development Stage: Concept
Schlagworte: Entangled photons, Photon pairs, Quantum Dots, Single photons,
Weitere Kategorien: Communication, Semiconductor, Physics & Engineering
Bild des Benutzers Dr. Kirk Haselton
Licensing Manager: Dr. Kirk Haselton
T +49 30 2125 4842
F +49 30 2125 4822
kirk.haselton@ipal.de
Suitable Industry: Security Industry, Communication, Information Technology
Benefits:

  • Compact photon pair source
  • High repetition rate
  • Produces photons on-demand