Deterministic Coupling of Single Quantum Dots to Single Nanocavity Modes

Abstract

We demonstrate a deterministic approach to the implementation of solid-state cavity quantum electrodynamics (QED) systems based on a precise spatial and spectral overlap between a single self-assembled quantum dot and a photonic crystal membrane nanocavity. By fine-tuning nanocavity modes with a high quality factor into resonance with any given quantum dot exciton, we observed clear signatures of cavity QED (such as the Purcell effect) in all fabricated structures. This approach removes the major hindrances that had limited the application of solid-state cavity QED and enables the realization of experiments previously proposed in the context of quantum information processing.

On‐chip single photon sources using planar photonic crystals and single quantum dots

“…In part due to new design insights, and due to continued improvements in semiconductor fabrication technologies, many pioneering experiments using single QD-emitted photons are now coming to the fore. Some of advantages of the QDs include: large exciton dipole moments; integrable with compact semiconductor systems [17]; fixed in position and stable; compatible with electronics and lasers. Moreover, their excitonic emission spectra can be nano-engineered to cover ultraviolet, visible, and infrared frequencies, rendering them fully compatible with telecom sources and components.…”

Directed self‐assembly of single quantum dots for telecommunication wavelength optical devices

“…Initial studies on dot-cavity systems [11,12,14] used low dot density samples, and large arrays of cavities, relying on statistics in order to find a resonant single dot -cavity system. More recently, deterministic dot-cavity coupling [21] has been achieved by registering the position of pre-selected quantum dots from a randomly nucleated ensemble using various methods [21][22][23] and fabricating tailored microcavities at the dot site.…”

Near-field mapping of quantum dot emission from single-photonic crystal cavity modes

“…Great interest has been recently dedicated to solid-state cavity quantum electrodynamic systems, where a semiconductor quantum dot (QD) is monolithically embedded in a photonic microcavity, leading to a single-photon source, Purcell effect and possibly strong coupling between excitons and photons [1][2][3]. A major problem in this very promising field is the difficulty of predetermining the exact resonance energy of the microcavity mode and the spatial location of the emitter.…”

“…A major problem in this very promising field is the difficulty of predetermining the exact resonance energy of the microcavity mode and the spatial location of the emitter. On one side, the deterministic nucleation of the QDs in the spatial position corresponding to the maximum amplitude of the optical mode is very complicated due to the self-aggregation nature of Stransky Krastanov dots [2]. On the other side, the exact spectral position of the resonance defect mode within the twodimensional (2D) photonic crystal (PC) cannot be predicted with the desired accuracy due to lack of precise control of all fabrication parameters.…”