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Authors: B. De Geyter, K. Komorowska, E. Brainis, P. Emplit, P. Geiregat, A. Hassinen, Z. Hens, D. Van Thourhout
Title: From fabrication to mode mapping in silicon nitride microdisk with embedded colloidal quantum dots
Format: International Journal
Publication date: 10/2012
Journal/Conference/Book: Applied Physics Letters
Volume(Issue): 101(16) p.161101~4
Internal Reference: [N-1334]
Download: Download this Publication (1MB) (1MB)

Abstract

We report on the fabrication of free-standing and optically active microdisks with cadmium-based
colloidal quantum dots embedded directly into silicon nitride. We show that the process optimization
results in low-loss silicon nitride microdisks. The Si3N4 matrix provides the stability necessary to
preserve the optical properties of the quantum dots and observe efficient coupling of the
photoluminescence to the resonating microdisk modes. Using a spectrally and spatially resolved
microphotoluminescence measurement, we map the emission pattern from the microdisk. This
technique allows us to identify the resonant modes. The results show good agreement with numerical
mode simulations.


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