3:45–5:00 pm
GCIS W301/303 929 E. 57th St
Speaker: Jennifer Hollingsworth, Div. of Chemistry, Los Alamos National Laboratory
Host: Prof. Elena Shevchenko, Dept. of Chemistry (eshevchenko@anl.gov)
From flask to devices: Exceptionally functional colloidal quantum emitters and deterministic integration
Colloidal quantum dots (cQDs) synthesized in simple laboratory flasks are finding real-world applications in demanding technologies from displays and lighting to photovoltaics and photodetectors. In the future, cQDs may be the basis for single-photon devices in quantum networks. Beyond quantum-size control, we pursue an expanded “structural toolbox” to synthetically engineer new quantum emitters with optimal quantum optical properties.1-9 And, taking advantage of their solution-phase processibility, we advance strategies, such as direct-write placement using scanning-probe techniques,10,11 for deterministic integration of quantum emitters into photonic and plasmonic platforms to realize properties not accessible through synthesis alone. Here, I will discuss our advances in synthesis of complex cQD heterostructures to enable photons-on-demand and photon purity from the visible through the telecom windows, as well as collaborations in novel hybrid emitter-antenna couples that achieve high-brightness by improving photon directionality and/or providing dramatic emission-rate enhancement,12,13 e.g., a lithography-free ultrabright (12.6 MHz), room-temperature C-band single-photon source.13
References
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- Dennis, A. M. et al., Adv. Funct. Mater. 2019, 29, 1809111.
- Hanson, C. J. et al., J. Am. Chem. Soc. 2017, 139, 11081.
- Mishra, N. et al., Nature Commun. 2017, 8, 15083.
- Dennis, A. M. et al., Nano Lett., 2012, 12, 5545.
- Ghosh, Y. et al., J. Am. Chem. Soc. 2012, 134, 9634.
- Chen, Y. et al., J. Am. Chem. Soc. 2008, 130, 5026.
- Dawood, F. et al., Small 2018, 14, 1801503.
- Abudayyeh, H. et al., APL Photonics 2021, 6, 036109.
- Nazarov, A. et al., ACS Photonics 2024, 11, 4453.
- Zhang, S. et al., ACS Nano 2025, 19, 19035.
About the JFI Colloquium: The James Franck Institute Colloquium is a monthly event inviting distinguished scholars from research institutions around the globe to share creative, groundbreaking research at the intersection of chemistry, physics, and materials science. As an interdisciplinary institution, the JFI welcomes researchers and students from a wide variety of scientific disciplines to attend and partake in lively discussion. Colloquium speakers are nominated by JFI faculty and selected annually by the colloquium committee. Find the full calendar on the JFI website.