Abstract
A system of two site-controlled semiconductor quantum dots (QDs) is deterministically integrated with a photonic crystal membrane nano-cavity. The two QDs are identified via their reproducible emission spectral features, and their coupling to the fundamental cavity mode is established by emission co-polarization and cavity feeding features. A theoretical model accounting for phonon interaction and pure dephasing reproduces the observed results and permits extraction of the light-matter coupling constant for this system. The demonstrated approach offers a platform for scaling up the integration of QD systems and nano-photonic elements for integrated quantum photonics applications.
Highlights
Studies of the radiative coupling of single semiconductor quantum dots (QDs) to photonic cavities unravel cavity quantum electrodynamic (c-QED) effects in the solid state[1, 2] and suggest robust and scalable platforms for integrated quantum photonics, e.g. for quantum information technologies[3,4,5]
We demonstrate such deterministic radiative coupling of two site-controlled QDs a photonic crystal (PhC) cavity, manifested by the observation of co-polarization and Purcell enhancement of their photoluminescence and confirmed with a microscopic model[21]
The μPL spectrum of the double-QD system seen in Fig. 2b, far detuned from the cavity mode (CM) resonance, exhibits spectral lines in which the X and X− of each dot can be identified by comparison with Fig. 2a
Summary
Studies of the radiative coupling of single semiconductor quantum dots (QDs) to photonic cavities unravel cavity quantum electrodynamic (c-QED) effects in the solid state[1, 2] and suggest robust and scalable platforms for integrated quantum photonics, e.g. for quantum information technologies[3,4,5] Scaling up these investigations to multi-QD systems is essential for implementing promising architectures based on quantum networks[6, 7] or multiplexed single photon sources[8]. We demonstrate such deterministic radiative coupling of two site-controlled QDs a PhC cavity, manifested by the observation of co-polarization and Purcell enhancement of their photoluminescence and confirmed with a microscopic model[21] These results illustrate a scalable approach to QD-based integrated quantum photonics
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