We report the fabrication of a single-mode solid-state single photon source, based on an isolated InAs quantum dot (QD) on resonance with the fundamental mode of a pillar microcavity. Photon correlation experiments under pulsed excitation reveal a clear antibunching behavior. We show that a preparation of the single photons in a given quantum state (same spatial mode, same polarization) can be obtained by placing a QD in resonance with the nondegenerate fundamental mode of an elliptical micropillar.

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This article introduces the concept of sufficiency, its specific dual nature (voluntary and obligatory), and its collective implications to the literature on sustainability. Sufficiency implies a reorganization of consumption priorities and is introduced by a discussion of consumerism and the dominant social paradigm. Long interviews with sufficient people show the complexity of the construct, which creates semantic oppositions around the notion of having (everything vs. nothing and not nothing vs. not everything). After a semiotic analysis of people’s interpretation of sufficiency, we propose a reflection about the use of macromarketing tools to better enhance and enact sufficiency in a collective way.

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