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Authors: I. Tanghe, T. Vandekerckhove, M. Samoli, A. Waters, D. Harankahage, M. Zamkov, Z. Hens, C. Seassal, H-S. Nguyen, D. Van Thourhout, P. Geiregat
Title: Unraveling the Nature of Lasing Emission from Hybrid Silicon Nitride and Colloidal Nanocrystal Low Refractive Index Photonic Crystals
Format: International Conference Proceedings
Publication date: 11/2024
Journal/Conference/Book: Annual Symposium of the IEEE Photonics Society Benelux Chapter
Editor/Publisher: IEEE, 
Citations: Look up on Google Scholar
Download: Download this Publication (675KB) (675KB)

Abstract

Silicon nitride is used for its low optical loss and high thermal stability, making it a suitable platform for visible-light applications within integrated photonic devices. However, its application has been limited due to inefficient light emission, a problem addressed by integrating various types of light emitters onto the platform through heterogeneous integration. In particular, the integration of solution-processable colloidal nanocrystals (NCs) as optical gain materials onto the silicon nitride platform is a promising route, but requires a more solid theoretical footing. Recently, demonstrations of lasing employing CdS bulk nanocrystals and CdSe/CdS Quantum Shells using 2D surface emitting photonic crystal structures have shown exciting results1,2 of lasing from green to red. Building on this, we model the light-matter interactions of the low index contrast NC/nitride platform for thorough understanding. This modeling shows the clustering of all the optical modes within a spectrally narrow bandwidth.

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