On-chip resonantly-driven quantum emitter with enhanced coherence
M.N. Makhonin, J. E. Dixon, R.J. Coles, B. Royall, E. Clarke, M.S., Skolnick, A.M. Fox

TL;DR
This paper demonstrates on-chip quantum dot resonance fluorescence with enhanced photon coherence, enabling scalable integrated quantum-optical devices for quantum information processing.
Contribution
It introduces a method to implement resonantly-driven quantum dot fluorescence on-chip with minimal laser background, improving photon coherence for quantum photonic circuits.
Findings
On-chip quantum dot RF with negligible laser background
Enhanced photon coherence compared to off-resonant excitation
Potential for scalable integrated quantum-optical devices
Abstract
Advances in nanotechnology provide techniques for the realisation of integrated quantum-optical circuits for on-chip quantum information processing(QIP). The indistinguishable single photons, required for such devices can be generated by parametric down-conversion, or from quantum emitters such as colour centres and quantum dots(QDs). Among these, semiconductor QDs offer distinctive capabilities including on-demand operation, coherent control, frequency tuning and compatibility with semiconductor nanotechnology. Moreover, the coherence of QD photons can be significantly enhanced in resonance fluorescence(RF) approaching at its best the coherence of the excitation laser. However, the implementation of QD RF in scalable on-chip geometries remains challenging due to the need to suppress stray laser photons. Here we report on-chip QD RF coupled into a single-mode waveguide with negligible…
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Taxonomy
TopicsSemiconductor Quantum Structures and Devices · Photonic and Optical Devices · Quantum Information and Cryptography
