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Simultaneous excitation of N single colloidal quantum dots

par Brainis, Edouard ;Henry, Vincent;Licari, Adrian;Staicu, Vlad;Hens, Zeger;Emplit, Philippe
Editeur scientifique Beri, Stefano
Référence 14th Annual Symposium of the IEEE Photonics Benelux Chapter(5-6 Novembre 2009: Vrije Universiteit Brussel, Brussels, Belgium), Proceedings of the 14th Annual Symposium of the IEEE Photonics Benelux Chapter, VUB Press, Brussels, page (189-192)
Publication Publié, 2009-11-05

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Résumé :

We report on the implementation of a new microscopy device that allows us to selectively excite up to 20 quantum dots simultaneously and collect their fluorescence. We use it to excite and observe single CdSe/ZnS quantum dots, which are known to be single photon emitters at room temperature. Complex excitation timings can be realised. The microscope works in confocal mode with a resolution of 2 micrometers and a field of view of 20 micrometers. We discuss applications of our device in quantum optics (imaging with incoherent single photons) and quantum cryptography (wavelength multiplexed quantum cryptography and “multi-colour” quantum cryptography).