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        Properties and Prospects of ZnSe-Based Quantum Dot Microcavity VCSEL Structures

        K. Sebald,H. Lohmeyer,J. Kalden,T. Meeser,J. Gutowski,C. Kruse,A. Gust,D. Hommel,J. Wiersig,N. Baer,F. Jahnke 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.1

        The emission properties of ZnSe-based monolithic microcavities with either quantum wells or quantum dots embedded are studied. These pillar structured samples reveal three-dimensional conned optical modes with high-quality factors and small mode volumes conrmed by theoretical calculations. We observed a strong enhancement of the emission intensity for quantum dots being in the spectral resonance with the cavity modes. The Purcell eect was probed by using timeresolved measurements. A pronounced enhancement of the spontaneous emission rate of quantum dots coupled to the discrete optical modes of the cavities demonstrates the occurrence of cavity quantum electrodynamics eects. The observed enhancement depends systematically on the pillar diameter and, thus, on the Purcell factor of the individual pillars. The emission properties of ZnSe-based monolithic microcavities with either quantum wells or quantum dots embedded are studied. These pillar structured samples reveal three-dimensional conned optical modes with high-quality factors and small mode volumes conrmed by theoretical calculations. We observed a strong enhancement of the emission intensity for quantum dots being in the spectral resonance with the cavity modes. The Purcell eect was probed by using timeresolved measurements. A pronounced enhancement of the spontaneous emission rate of quantum dots coupled to the discrete optical modes of the cavities demonstrates the occurrence of cavity quantum electrodynamics eects. The observed enhancement depends systematically on the pillar diameter and, thus, on the Purcell factor of the individual pillars.

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