Single-photon non-linear optics with a quantum dot in a waveguide

TY - JOUR

T1 - Single-photon non-linear optics with a quantum dot in a waveguide

AU - Javadi, Alisa

AU - Sollner, Immo Nathanael

AU - Arcari, Marta

AU - Hansen, Sofie Lindskov

AU - Midolo, Leonardo

AU - Mahmoodian, Sahand

AU - Kirsanské, Gabija

AU - Pregnolato, Tommaso

AU - Lee, E.H.

AU - Song, J.D.

AU - Stobbe, Søren

AU - Lodahl, Peter

PY - 2015/10/23

Y1 - 2015/10/23

N2 - Strong non-linear interactions between photons enable logic operations for both classical and quantum-information technology. Unfortunately, non-linear interactions are usually feeble and therefore all-optical logic gates tend to be inefficient. A quantum emitter deterministically coupled to a propagating mode fundamentally changes the situation, since each photon inevitably interacts with the emitter, and highly correlated many-photon states may be created. Here we show that a single quantum dot in a photonic-crystal waveguide can be used as a giant non-linearity sensitive at the single-photon level. The non-linear response is revealed from the intensity and quantum statistics of the scattered photons, and contains contributions from an entangled photon-photon bound state. The quantum non-linearity will find immediate applications for deterministic Bell-state measurements and single-photon transistors and paves the way to scalable waveguide-based photonic quantum-computing architectures.

AB - Strong non-linear interactions between photons enable logic operations for both classical and quantum-information technology. Unfortunately, non-linear interactions are usually feeble and therefore all-optical logic gates tend to be inefficient. A quantum emitter deterministically coupled to a propagating mode fundamentally changes the situation, since each photon inevitably interacts with the emitter, and highly correlated many-photon states may be created. Here we show that a single quantum dot in a photonic-crystal waveguide can be used as a giant non-linearity sensitive at the single-photon level. The non-linear response is revealed from the intensity and quantum statistics of the scattered photons, and contains contributions from an entangled photon-photon bound state. The quantum non-linearity will find immediate applications for deterministic Bell-state measurements and single-photon transistors and paves the way to scalable waveguide-based photonic quantum-computing architectures.

U2 - 10.1038/ncomms9655

DO - 10.1038/ncomms9655

M3 - Journal article

C2 - 26492951

SN - 2041-1723

VL - 6

JO - Nature Communications

JF - Nature Communications

M1 - 8655

ER -