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Quantum Photonics > Research

In nano-sized optical devices, light-matter interactions can be made so strong that quantum mechanical effects are decisive. The main focus of the Quantum Photonics Group is on techniques to control the quantum dynamics of quantum dots interacting with photons.

In this way we can fabricate light sources that emit single photons on demand, or entangle quantum dots and photons. Such nanophotonic devices will find applications for quantum information purposes and provide a route towards scalable quantum computing. In addition to developing and testing novel devices, we explore the fascinating fundamental physics of light and matter confined to the nano-scale.

Quantum Optics with Anderson Localized-Modes in Random Media

28 November 2011

Enhancing the interaction between light and matter is the essence of many research disciplines including quantum information science, energy harvesting, and sensing.
 

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Enhancement of Light-Matter Interaction with Mesoscopic Emitters

02 November 2011

We are pursuing various ways of increasing the interaction strength between light and matter. Recently, we have discovered that surface plasmons can increase spontaneous emission rates beyond the limits of the dipole approximation.

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Controlling Spontaneous Emission with Photonic Crystals

02 November 2011

It is well known that the spontaneous emission of a quantum emitter depends not only on the intrinsic properties of the emitter, but also on the density of vacuum fluctuations surrounding the emitter.

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Cavity-Quantum Electrodynamics with Quantum Dots

02 November 2011

Cavity-Quantum Electrodynamics with Quantum DotsEnhancing the interaction between a single photon and a single quantum emitter is an essential requirement needed for many quantum information schemes. To this end solid-state quantum dots embedded in photonic nanocavities have proven to be very promising.

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Enhancement of Light-Matter Interaction in Semiconductor Nanostructures

02 November 2011

Enhancement of Light-Matter Interaction in Semiconductor Nanostructures

Enhancement of light-matter interaction is of great interest for fundamental science and technology alike. The efficiency of solar cells, semiconductor lasers, photodetectors, and single-photon sources all rely on...

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Single-Photon Source Based on Coupling to Plasmons in Nanoscale Metallic Structures

02 November 2011

Single-Photon Source Based on Coupling to Plasmons in Nanoscale Metallic StructuresA strong modification of the spontaneous decay rate of an excited quantum dot can be achieved by placing nanoscaled metallic objects close to the quantum dot. We will study both experimentally and theoretically...

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Quantum Optics in Multiple Scattering Random Media

02 November 2011

Quantum Optics in Multiple Scattering Random MediaNoise is inevitable in all measurements and limits the performance of optical devices like amplifiers and lasers. At the most fundamental level, optical noise is limited by quantum fluctuations of light associated with...

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Publications

02 November 2011

 

Publications 


Submitted papers

75. J. R. Ott, M. Wubs, P. Lodahl, N. A. Mortensen, R. Kaiser,
Cooperative fluorescence from a strongly driven dilute cloud of atoms
74. A. Javadi, P. D. Garcia, L. Sapienza, H. Thyrrestrup, P. Lodahl,
Statistical measurements of quantum emitters coupled to Anderson-localized modes in disordered photonic-crystal waveguides

73. P. Lodahl and S. Stobbe,
Solid-state quantum optics with quantum dots in photonic nanostructures

72. K. H. Madsen and P. Lodahl, ...

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Quantum Electrodynamics Experiments in Photonic Crystal Waveguides

01 November 2011

Single Photon Emission in Photonic Crystal WaveguidesOur current experimental efforts are focused on the strong few-photon nonlinearity mediated by a single quantum dot strongly coupled to a one-dimensional waveguide. 

 

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