| Authors: | L. Elsinger, R. Petit, F. Van Acker, N. K. Zawacka, I. Tanghe, K. Neyts, C. Detavernier, P. Geiregat, Z. Hens, D. Van Thourhout | | Title: | Waveguide-Coupled Colloidal Quantum Dot Light Emitting Diodes and Detectors on a Silicon Nitride Platform | | Format: | International Journal | | Publication date: | 5/2021 | | Journal/Conference/Book: | Lasers & Photonics Reviews
| | Editor/Publisher: | Wiley, | | Volume(Issue): | 15(7) p.n/a - n/a | | Location: | Gent, Belgium | | DOI: | 10.1002/lpor.202000230 | | Citations: | 19 (Dimensions.ai - last update: 15/12/2024)
13 (OpenCitations - last update: 2/12/2024)
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Abstract
Colloidal quantum dots (QDs) are an attractive light source for visiblephotonics, in particular their widely tunable emission wavelength,inexpensive wet-chemical synthesis and straight-forward hybrid integrationcan make the difference. In this work, integrated light-emitting diodes aredemonstrated based on CdSe/CdS QDs, with the emission directly coupled toa silicon nitride waveguide. The devices feature a record current density of upto 100 A cm−2and a maximum on-chip power density of almost 1.5 W cm−2in a single-mode waveguide. Operated as detectors, the photodiodes have alow dark current of 1.5 μA cm−2. It is anticipated, that the devices will find anapplication in chip-based absorption spectroscopy and bio-sensing, as theycan be post-processed on foundry-fabricated waveguide platforms, at a lowcost. In addition, this approach provides the missing low-loss waveguidelayer, necessary for building an electrically pumped laser using colloidal QDs. Related Research Topics
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