Journal
NANO LETTERS
Volume 18, Issue 10, Pages 6404-6410Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.8b02764
Keywords
Photonic crystal cavity; colloidal quantum dots; light-matter interaction; hybrid integrated photonics
Categories
Funding
- National Science Foundation [NSF-EFRI-1433496, NSF-ECCS-1708579, 0335765, 1337840]
- NSF MRSEC [1719797]
- NSF [1836500]
- Air Force Office of Scientific Research [FA9550-18-1-0104]
- Alfred P. Sloan research fellowship
- David and Lucile Packard Foundation
- Washington Research Foundation
- M. J. Murdock Charitable Trust
- GCE Market
- Class One Technologies
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1836500] Funding Source: National Science Foundation
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Engineering an array of precisely located cavity-coupled active media poses a major experimental challenge in the field of hybrid integrated photonics. We deterministically position solution-processed colloidal quantum dots (QDs) on high quality (Q)-factor silicon nitride nanobeam cavities and demonstrate light-matter coupling. By lithographically defining a window on top of an encapsulated cavity that is cladded in a polymer resist, and spin coating the QD solution, we can precisely control the placement of the QDs, which subsequently couple to the cavity. We show rudimentary control of the number of QDs coupled to the cavity by modifying the size of the window. Furthermore, we demonstrate Purcell enhancement and saturable photoluminescence in this QD-cavity platform. Finally, we deterministically position QDs on a photonic molecule and observe QD-coupled cavity supermodes. Our results pave the way for precisely controlling the number of QDs coupled to a cavity by engineering the window size, the QD dimension, and the solution chemistry and will allow advanced studies in cavity enhanced single photon emission, ultralow power nonlinear optics, and quantum many-body simulations with interacting photons.
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