On-chip electrically controlled routing of photons from a single quantum dot

Electrical control of on-chip routing of photons emitted by a single InAs/GaAs self-assembled quantum dot (SAQD) is demonstrated in a photonic crystal cavity-waveguide system. The SAQD is located inside an H1 cavity, which is coupled to two photonic crystal waveguides. The SAQD emission wavelength i...

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Bibliographic Details
Published in:Applied physics letters 2015-06, Vol.106 (22)
Main Authors: Bentham, C., Itskevich, I. E., Coles, R. J., Royall, B., Clarke, E., O'Hara, J., Prtljaga, N., Fox, A. M., Skolnick, M. S., Wilson, L. R.
Format: Article
Language:English
Subjects:
Applied physics
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Coupled modes
CRYSTALS
Emission
GALLIUM ARSENIDES
INDIUM ARSENIDES
Photonic crystals
PHOTONS
QUANTUM DOTS
Quantum theory
RESONANCE
Routers
Self-assembly
STARK EFFECT
WAVEGUIDES
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Summary:Electrical control of on-chip routing of photons emitted by a single InAs/GaAs self-assembled quantum dot (SAQD) is demonstrated in a photonic crystal cavity-waveguide system. The SAQD is located inside an H1 cavity, which is coupled to two photonic crystal waveguides. The SAQD emission wavelength is electrically tunable by the quantum-confined Stark effect. When the SAQD emission is brought into resonance with one of two H1 cavity modes, it is preferentially routed to the waveguide to which that mode is selectively coupled. This proof of concept provides the basis for scalable, low-power, high-speed operation of single-photon routers for use in integrated quantum photonic circuits.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4922041