Metal-coated semiconductor nanostructures and simulation of photon extraction and coupling to optical fibers for a solid-state single-photon source.

Nanotechnology 2013 Nov 18;24(45):455205. Epub 2013 Oct 18.

Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0020, Japan.

We have realized metal-coated semiconductor nanostructures for a stable and efficient single-photon source (SPS) and demonstrated improved single-photon extraction efficiency by the selection of metals and nanostructures. We demonstrate with finite-difference time-domain (FDTD) simulations that inclination of a pillar sidewall, which changes the structure to a nanocone, is effective in improving the photon extraction efficiency. We demonstrate how such nanocone structures with inclined sidewalls are fabricated with reactive ion etching. With the optimized design, a photon extraction efficiency to outer airside as high as ~97% generated from a quantum dot in a nanocone structure is simulated, which is the important step in realizing SPS on-demand operations. We have also examined the direct contact of such a metal-embedded nanocone structure with a single-mode fiber facet as a simple and practical method for preparing fiber-coupled SPS and demonstrated practical coupling efficiencies of ~16% with FDTD simulation.

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http://dx.doi.org/10.1088/0957-4484/24/45/455205DOI Listing
November 2013
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References

(Supplied by CrossRef)

Korolkova N V et al.
Quantum Electron. 1998

Loudon R et al.
The Quantum Theory of Light 1973

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