Controlling the Spontaneous Emission Rate of Single Quantum Dots in a Two-Dimensional Photonic Crystal

2005/01/31 by Dirk Englund, David Fattal, Edo Waks +10 · 974 citations
Engineering · Physics and Astronomy · #Atomic physics #Finite-difference time-domain method #Laser #Materials science #Molecular physics #Optics #Optoelectronics #Photon #Photonic Crystals and Applications #Photonic and Optical Devices #Photonic crystal #Photonics #Physics #Purcell effect #Quantum dot #Quantum optics #Semiconductor Quantum Structures and Devices #Single-photon source #Spontaneous emission #quant-ph

paper · pdf · doi:10.1103/physrevlett.95.013904

published in Physical Review Letters 95(1), 013904 (American Physical Society) · 11 pages, 6 figures

arxiv created 2005/04/20 · openalex publication_date 2005/07/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We observe large spontaneous emission rate modification of individual InAs quantum dots (QDs) in a 2D photonic crystal with a modified, high-Q single-defect cavity. Compared to QDs in a bulk semiconductor, QDs that are resonant with the cavity show an emission rate increase of up to a factor of 8. In contrast, off-resonant QDs indicate up to fivefold rate quenching as the local density of optical states is diminished in the photonic crystal. In both cases, we demonstrate photon antibunching, showing that the structure represents an on-demand single photon source with a pulse duration from 210 ps to 8 ns. We explain the suppression of QD emission rate using finite difference time domain simulations and find good agreement with experiment.

Citations

• Vacuum Rabi splitting with a single quantum dot in a photonic crystal nanocavity.
• Dynamical Symmetry Breaking under Core Excitation in Graphite: Polarization Correlation in Soft X-Ray Recombination Emission
• Enhanced single-photon emission from a quantum dot in a micropost microcavity

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• Dirk Englund [wikipedia]