Applied Physics

Better Single-Photon Emitters

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Science  28 Jan 2005:
Vol. 307, Issue 5709, pp. 483
DOI: 10.1126/science.307.5709.483c

The reliable emission of single photons in a particular direction from quantum dots and quantum well structures is an important requisite for applications in quantum information processing and quantum cryptography. However, in many implementations, the photons are emitted in bunches with poor control over the direction in which they are emitted. Bennett et al. use a photolithographically defined pillar-design microcavity to restrict the optical modes into which the photons can be emitted. Using such a design for pillars 1.9 μm in diameter, they demonstrate a reproducible method providing a considerable improvement in both the single-photon emission and control over the direction of emission. — ISO

Opt. Exp. 13, 50 (2005).

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