Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/144170
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 Goksu
Koh, Weon-Kyu
Abujetas, Diego R.
Sánchez-Gil, José A.
Paniagua-Domínguez, Ramón
Demir, Hilmi Volkan
Kuznetsov, Arseniy I.
Keywords: Engineering::Materials::Nanostructured materials
Issue Date: 2020
Source: Wu, M., Ha, S. T., Shendre, S., Durmusoglu, E. G., Koh, W., Abujetas, D. R., Sánchez-Gil, J. A., Paniagua-Domínguez, R., Demir, H. V. & Kuznetsov, A. I. (2020). Room-temperature lasing in colloidal nanoplatelets via Mie-resonant bound states in the continuum. Nano Letters, 20(8), 6005-6011. https://dx.doi.org/10.1021/acs.nanolett.0c01975
Project: SERC 152 73 00025 
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.
URI: https://hdl.handle.net/10356/144170
ISSN: 1530-6992
DOI: 10.1021/acs.nanolett.0c01975
Schools: School of Electrical and Electronic Engineering 
School of Physical and Mathematical Sciences 
Organisations: LUMINOUS! Centre of Excellence for Semiconductor Lighting and Displays
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 https://doi.org/10.1021/acs.nanolett.0c01975
Fulltext Permission: open
Fulltext Availability: With Fulltext
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