Direct observation of nanofabrication influence on the optical properties of single self-assembled InAs/GaAs quantum dots

Abstract

Single self-assembled InAs/GaAs quantum dots are a promising solid-state quantum technology, with which vacuum Rabi splitting, single-photon-level nonlinearities, and bright, pure, and indistinguishable single-photon generation having been demonstrated. For such achievements, nanofabrication is used to create structures in which the quantum dot preferentially interacts with strongly-confined optical modes. An open question is the extent to which such nanofabrication may also have an adverse influence, through the creation of traps and surface states that could induce blinking, spectral diffusion, and dephasing. Here, we use photoluminescence imaging to locate the positions of single InAs/GaAs quantum dots with respect to alignment marks with < 5 nm uncertainty, allowing us to measure their behavior before and after fabrication. We track the quantum dot emission linewidth and photon statistics as a function of distance from an etched surface, and find that the linewidth is significantly broadened (up to several GHz) for etched surfaces within a couple hundred nanometers of the quantum dot. However, we do not observe appreciable reduction of the quantum dot radiative efficiency due to blinking. We also show that atomic layer deposition can stabilize spectral diffusion of the quantum dot emission, and partially recover its linewidth.

arXiv comment11 pages, 8 figures

References in corpus (17)

• Near optimal single photon sources in the solid state
• On-Demand Single Photons with High Extraction Efficiency and Near-Unity Indistinguishability from a Resonantly Driven Quantum Dot in a Micropillar
• On-demand semiconductor single-photon source with near-unity indistinguishability
• Nanoscale optical positioning of single quantum dots for bright and pure single-photon emission
• High Purcell factor generation of coherent on-chip single photons
• Transform-limited single photons from a single quantum dot
• Unconventional motional narrowing in the optical spectrum of a semiconductor quantum dot
• Highly indistinguishable on-demand resonance fluorescence photons from a deterministic quantum dot micropillar device with 75 $\%$ extraction efficiency
• Generation and transfer of single photons on a photonic crystal chip
• Probing single charge fluctuations in a semiconductor with laser spectroscopy on a quantum dot
• A circular dielectric grating for vertical extraction of single quantum dot emission
• Indistinguishable and efficient single photons from a quantum dot in a planar nanobeam waveguide
• Phase-locked indistinguishable photons with synthesized waveforms from a solid-state source
• Efficient out-coupling of high-purity single photons from a coherent quantum dot in a photonic-crystal cavity
• Cryogenic photoluminescence imaging system for nanoscale positioning of single quantum emitters
• Multiple time scale blinking in InAs quantum dot single-photon sources
• Surface effects in a semiconductor photonic nanowire and spectral stability of an embedded single quantum dot

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