Gain and lasing from CdSe/CdS nanoplatelet stripe waveguides
ABSTRACT: Colloidal semiconducting nanocrystals are efficient, stable and spectrally tunable emitters, but achievable optical gain is often limited by fast nonradiative processes. These processes are strongly suppressed in slab-shaped nanocrystals (nanoplatelets), due to relaxed exciton Coulomb inte...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-11-01
|
| Series: | Micro and Nano Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590007222000648 |
| _version_ | 1811329849270206464 |
|---|---|
| author | Martin Belitsch Dmitry N. Dirin Maksym V. Kovalenko Kevin Pichler Stefan Rotter Ahmed Ghalgaoui Harald Ditlbacher Andreas Hohenau Joachim R. Krenn |
| author_facet | Martin Belitsch Dmitry N. Dirin Maksym V. Kovalenko Kevin Pichler Stefan Rotter Ahmed Ghalgaoui Harald Ditlbacher Andreas Hohenau Joachim R. Krenn |
| author_sort | Martin Belitsch |
| collection | DOAJ |
| description | ABSTRACT: Colloidal semiconducting nanocrystals are efficient, stable and spectrally tunable emitters, but achievable optical gain is often limited by fast nonradiative processes. These processes are strongly suppressed in slab-shaped nanocrystals (nanoplatelets), due to relaxed exciton Coulomb interaction. Here, we show that CdSe/CdS nanoplatelets can be engineered into (sub)microscopic stripe waveguides that achieve lasing without further components for feedback, i.e., just relying on the stripe end reflection. We find a remarkably high gain factor for the CdSe/CdS nanoplatelets of 1630cm−1. In addition, by comparison with numerical simulations we assign a distinct emission peak broadening above laser threshold to emission pulse shortening. Our results illustrate the feasibility of geometrically simple monolithic microscale nanoplatelet lasers as an attractive option for a variety of photonic applications. |
| first_indexed | 2024-04-13T15:51:17Z |
| format | Article |
| id | doaj.art-b503640326a34795a1c6de3850a94aae |
| institution | Directory Open Access Journal |
| issn | 2590-0072 |
| language | English |
| last_indexed | 2024-04-13T15:51:17Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Micro and Nano Engineering |
| spelling | doaj.art-b503640326a34795a1c6de3850a94aae2022-12-22T02:40:50ZengElsevierMicro and Nano Engineering2590-00722022-11-0117100167Gain and lasing from CdSe/CdS nanoplatelet stripe waveguidesMartin Belitsch0Dmitry N. Dirin1Maksym V. Kovalenko2Kevin Pichler3Stefan Rotter4Ahmed Ghalgaoui5Harald Ditlbacher6Andreas Hohenau7Joachim R. Krenn8Institute of Physics, University of Graz, 8010 Graz, AustriaInstitute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH, 8093 Zürich, Switzerland; Empa - Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Thin Films and Photovoltaics, 8600 Dübendorf, SwitzerlandInstitute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH, 8093 Zürich, Switzerland; Empa - Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Thin Films and Photovoltaics, 8600 Dübendorf, SwitzerlandInstitute for Theoretical Physics, TU Wien, 1040 Vienna, AustriaInstitute for Theoretical Physics, TU Wien, 1040 Vienna, AustriaMax-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, 12489 Berlin, GermanyInstitute of Physics, University of Graz, 8010 Graz, AustriaInstitute of Physics, University of Graz, 8010 Graz, AustriaInstitute of Physics, University of Graz, 8010 Graz, Austria; Corresponding author.ABSTRACT: Colloidal semiconducting nanocrystals are efficient, stable and spectrally tunable emitters, but achievable optical gain is often limited by fast nonradiative processes. These processes are strongly suppressed in slab-shaped nanocrystals (nanoplatelets), due to relaxed exciton Coulomb interaction. Here, we show that CdSe/CdS nanoplatelets can be engineered into (sub)microscopic stripe waveguides that achieve lasing without further components for feedback, i.e., just relying on the stripe end reflection. We find a remarkably high gain factor for the CdSe/CdS nanoplatelets of 1630cm−1. In addition, by comparison with numerical simulations we assign a distinct emission peak broadening above laser threshold to emission pulse shortening. Our results illustrate the feasibility of geometrically simple monolithic microscale nanoplatelet lasers as an attractive option for a variety of photonic applications.http://www.sciencedirect.com/science/article/pii/S2590007222000648Quantum dotsNanoplateletsLasing |
| spellingShingle | Martin Belitsch Dmitry N. Dirin Maksym V. Kovalenko Kevin Pichler Stefan Rotter Ahmed Ghalgaoui Harald Ditlbacher Andreas Hohenau Joachim R. Krenn Gain and lasing from CdSe/CdS nanoplatelet stripe waveguides Micro and Nano Engineering Quantum dots Nanoplatelets Lasing |
| title | Gain and lasing from CdSe/CdS nanoplatelet stripe waveguides |
| title_full | Gain and lasing from CdSe/CdS nanoplatelet stripe waveguides |
| title_fullStr | Gain and lasing from CdSe/CdS nanoplatelet stripe waveguides |
| title_full_unstemmed | Gain and lasing from CdSe/CdS nanoplatelet stripe waveguides |
| title_short | Gain and lasing from CdSe/CdS nanoplatelet stripe waveguides |
| title_sort | gain and lasing from cdse cds nanoplatelet stripe waveguides |
| topic | Quantum dots Nanoplatelets Lasing |
| url | http://www.sciencedirect.com/science/article/pii/S2590007222000648 |
| work_keys_str_mv | AT martinbelitsch gainandlasingfromcdsecdsnanoplateletstripewaveguides AT dmitryndirin gainandlasingfromcdsecdsnanoplateletstripewaveguides AT maksymvkovalenko gainandlasingfromcdsecdsnanoplateletstripewaveguides AT kevinpichler gainandlasingfromcdsecdsnanoplateletstripewaveguides AT stefanrotter gainandlasingfromcdsecdsnanoplateletstripewaveguides AT ahmedghalgaoui gainandlasingfromcdsecdsnanoplateletstripewaveguides AT haraldditlbacher gainandlasingfromcdsecdsnanoplateletstripewaveguides AT andreashohenau gainandlasingfromcdsecdsnanoplateletstripewaveguides AT joachimrkrenn gainandlasingfromcdsecdsnanoplateletstripewaveguides |