Partners and International Organizations
(English)
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AT, BE, BG, CH, CY, CZ, DE, DK, ES, FI, FR, GR, HU, IE, IL, IT, LT, NL, PL, RO, SE, SK, UK
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Abstract
(English)
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We made significant progress in integrating quantum nanostructures that can provide optical gain or saturable loss into high finesse photonic crystal (PhC) microcavities. The (In)GaAs/(Al)GaAs nanostructures consist of site-controlled V-groove quantum wires (QWRs) or pyramidal quantum dots (QDs) made by organometallic chemical vapor depostion on patterned GaAs substrates. The PhC microcavities are realized in membrane-PhC structures fabricated using electron beam lithography and wet/dry chemical etching. Several types of PhC cavities designed to incorporate single QWRs, single QDs and coupled QWR/QD structures were designed and modeled. The integrations of a single QWR and a single QD in PhC membrane cavities with a finesse of several thousands were successfully implemented. The low-temperature photoluminescence spectra of these active PhC cavities clearly evidence the coupling of the QWR/QD spontaneous emission into one of the PhC cavity modes. Coupled PhC membrane cavities incorporating a single QWR were also fabricated and investigated. Their luminescence characteristics evidence coupling of the cavity modes that show splitting not only of their resonant frequency but also their losses. This integration approach holds promise for the realization of ultra-low threshold lasers, optical switches and efficient single photon sources.
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