SESQ.COM · Spontaneous Emission of Semiconductor Quantum DotsControlled in Optical Microcavities

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Project objective

The development of efficient sources of single photons is a major challenge in the context of quantum communications and quantum information processing. The state-of the art solid state based single photon sources (SPS) are based on III-V quantum dots embedded in micropillar cavities.Despite intensive research two main challenges remain to date: First, the efficiency of single photon generation is low, due to the limitations in efficient micropillar output coupling. Second, the degree of indistinguishabil ity of the photons obtained is insufficient for practical applications.Here we propose to address both of the aforementioned challenges. In a first research phase single photons will be generated using quantum dot embedded in photonic crystal microcavitie s. In a second phase, a novel approach will be introduced in order to significantly increase the SPS efficiency; a quantum dot microdisk will be directly coupled to an optical tapered fiber.These novel SPS should find utilisation in cascadable quantum gates and quantum information systems or in experiments on the fundamental concepts of quantum mechanics, two areas that mobilize the international physics community and in which Europe has a lead.The training aspects of the project involve a significant enlargement of the scientific field of the applicant into a fast-advancing new area of quantum optical devices, acquisition of cutting-edge nanofabrication technical skills, and the development of project management and apprentice guidance methods, essential for an independent research career.The hosting institution is the Laboratory for Photonics and Nanostructures (LPN), the main French nanofabrication facility and one of the leading laboratories in nanofabrication and quantum optics worldwide.The applicant is a German scientist, with Ph.D. training at Caltech in the USA, returning to Europe to launch his career and choosing LPN and the scientific opportunities it provides, as his entry point.

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Participants

• CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE · PARISCoordinatorFrance

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