Lasing by Template-Assisted Self-Assembled Quantum Dots

Aftenieva O, Sudzius M, Prudnikau A, Adnan M, Sarkar S, Lesnyak V, Leo K, Fery A, Koenig TAF (2023)

Publication Type: Journal article

Publication year: 2023

Journal

Advanced Optical Materials Wiley

DOI: 10.1002/adom.202202226

Abstract

Miniaturized laser sources with low threshold power are required for integrated photonic devices. Photostable core/shell nanocrystals are well suited as gain material and their laser properties can be exploited by direct patterning as distributed feedback (DFB) lasers. Here, the 2nd-order DFB resonators tuned to the photoluminescence wavelength of the QDs are used. Soft lithography based on template-assisted colloidal self-assembly enables pattern resolution in the subwavelength range. Combined with the directional Langmuir–Blodgett arrangement, control of the waveguide layer thickness is further achieved. It is shown that a lasing threshold of 5.5 mJ cm−2 is reached by a direct printing method, which can be further reduced by a factor of ten (0.6 mJ cm−2) at an optimal waveguide thickness. Moreover, it is discussed how one can adjust the DFB geometries to any working wavelength. This colloidal approach offers prospects for applications in bioimaging, biomedical sensing, anti-counterfeiting, or displays.

Involved external institutions

Leibniz-Institut für Polymerforschung Dresden e. V. DE Germany (DE) Technische Universität Dresden DE Germany (DE)

How to cite

APA:

Aftenieva, O., Sudzius, M., Prudnikau, A., Adnan, M., Sarkar, S., Lesnyak, V.,... Koenig, T.A.F. (2023). Lasing by Template-Assisted Self-Assembled Quantum Dots. Advanced Optical Materials. https://doi.org/10.1002/adom.202202226

MLA:

Aftenieva, Olha, et al. "Lasing by Template-Assisted Self-Assembled Quantum Dots." Advanced Optical Materials (2023).

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