Hemispherical resonators with embedded nanocrystal quantum rod emitters
2010; American Institute of Physics; Volume: 97; Issue: 21 Linguagem: Inglês
10.1063/1.3517566
ISSN1520-8842
AutoresJohannes Haase, Susumu Shinohara, Paul Mundra, G. Risse, V. G. Lyssenko, H. Fröb, Martina Hentschel, Alexander Eychmüller, Karl Leo,
Tópico(s)Plasmonic and Surface Plasmon Research
ResumoWe report a technique to prepare hemispherical resonators on a distributed Bragg reflector (DBR). This so-called hydrophobic spreading allows the creation of hemispherical structures with diameters ranging from 5 to 50 μm. By embedding semiconductor nanocrystal quantum rods (NQRs) into these structures, we achieve a coupling of their emission into whispering-gallery modes. Although the NQR-emission is confined in three dimensions, the DBR is transparent for the excitation, allowing selective excitation of different regions of the hemisphere. Employing a two-dimensional model to approximately describe relevant modes, we are able to estimate the refractive index and diameters of the hemispheres from spectral data.
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