Topological insulator vertical-cavity laser array.

Autor: Dikopoltsev A; Physics Department, Technion, 32000 Haifa, Israel., Harder TH; Technische Physik, Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems, and Würzburg-Dresden Cluster of Excellence ct.qmat, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany., Lustig E; Physics Department, Technion, 32000 Haifa, Israel., Egorov OA; ITFO, Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, D-07743 Jena, Germany., Beierlein J; Technische Physik, Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems, and Würzburg-Dresden Cluster of Excellence ct.qmat, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany., Wolf A; Technische Physik, Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems, and Würzburg-Dresden Cluster of Excellence ct.qmat, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany., Lumer Y; Physics Department, Technion, 32000 Haifa, Israel., Emmerling M; Technische Physik, Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems, and Würzburg-Dresden Cluster of Excellence ct.qmat, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany., Schneider C; Institute of Physics, University of Oldenburg, D-26129 Oldenburg, Germany., Höfling S; Technische Physik, Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems, and Würzburg-Dresden Cluster of Excellence ct.qmat, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany., Segev M; Physics Department, Technion, 32000 Haifa, Israel., Klembt S; Technische Physik, Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems, and Würzburg-Dresden Cluster of Excellence ct.qmat, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany.
Jazyk: angličtina
Zdroj: Science (New York, N.Y.) [Science] 2021 Sep 24; Vol. 373 (6562), pp. 1514-1517. Date of Electronic Publication: 2021 Sep 23.
DOI: 10.1126/science.abj2232
Abstrakt: Topological insulator lasers are arrays of semiconductor lasers that exploit fundamental features of topology to force all emitters to act as a single coherent laser. In this study, we demonstrate a topological insulator vertical-cavity surface-emitting laser (VCSEL) array. Each VCSEL emits vertically, but the in-plane coupling between emitters in the topological-crystalline platform facilitates coherent emission of the whole array. Our topological VCSEL array emits at a single frequency and displays interference, highlighting that the emitters are mutually coherent. Our experiments exemplify the power of topological transport of light: The light spends most of its time oscillating vertically, but the small in-plane coupling is sufficient to force the array of individual emitters to act as a single laser.
Databáze: MEDLINE
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