Lasing by Template-Assisted Self-Assembled Quantum Dots
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
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.
Details
Originalsprache | Englisch |
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Aufsatznummer | 2202226 |
Fachzeitschrift | Advanced optical materials |
Jahrgang | 11 |
Ausgabenummer | 6 |
Publikationsstatus | Veröffentlicht - 17 März 2023 |
Peer-Review-Status | Ja |
Externe IDs
WOS | 000914581300001 |
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Schlagworte
ASJC Scopus Sachgebiete
Schlagwörter
- confinement self-assembly, distributed feedback laser, quantum dots, soft lithography, Soft lithography, Confinement self-assembly, Quantum dots, Distributed feedback laser