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Title: Room-temperature lasing in colloidal nanoplatelets via Mie-resonant bound states in the continuum
Authors: Wu, Mengfei
Ha, Son Tung
Shendre, Sushant
Durmusoglu, Emek G.
Koh, Weon-Kyu
Abujetas, Diego R.
Sánchez-Gil, José A.
Paniagua-Domínguez, Ramón
Demir, Hilmi Volkan
Kuznetsov, Arseniy I.
Keywords: Engineering
Issue Date: 2020
Source: Wu, M., Ha, S. T., Shendre, S., Durmusoglu, E. G., Koh, W.-K., Abujetas, D. R., ... Kuznetsov, A. I. (2020). Room-temperature lasing in colloidal nanoplatelets via Mie-resonant bound states in the continuum. Nano Letters, 20(8), 6005–6011. doi:10.1021/acs.nanolett.0c01975
Journal: Nano Letters
Abstract: Solid-state room-temperature lasing with tunability in a wide range of wavelengths is desirable for many applications. To achieve this, besides an efficient gain material with a tunable emission wavelength, a high quality-factor optical cavity is essential. Here, we combine a film of colloidal CdSe/CdZnS core-shell nanoplatelets with square arrays of nanocylinders made of titanium dioxide to achieve optically pumped lasing at visible wavelengths and room temperature. The all-dielectric arrays support bound states in the continuum (BICs), which result from lattice-mediated Mie resonances and boast infinite quality factors in theory. In particular, we demonstrate lasing from a BIC that originates from out-of-plane magnetic dipoles oscillating in phase. By adjusting the diameter of the cylinders, we tune the lasing wavelength across the gain bandwidth of the nanoplatelets. The spectral tunability of both the cavity resonance and nanoplatelet gain, together with efficient light confinement in BICs, promises low-threshold lasing with wide selectivity in wavelengths.
ISSN: 1530-6992
DOI: 10.1021/acs.nanolett.0c01975
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials and Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
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