Scalable functionalization of optical fibers using atomically thin semiconductors Ngo, Gia Quyet George, Antony Schock, Robin Tristan Klaus Tuniz, Alessandro Najafidehaghani, Emad Gan, Ziyang Geib, Nils C. Bucher, Tobias Knopf, Heiko Saravi, Sina Neumann, Christof Lühder, Tilman Schartner, Erik P. Warren‐Smith, Stephen C. Ebendorff‐Heidepriem, Heike Pertsch, Thomas Schmidt, Markus A. Turchanin, Andrey Eilenberger, Falk article article article Text https://doi.org/10.1002/adma.202003826 https://nbn-resolving.org/urn:nbn:de:gbv:27-dbt-20210913-103940-003 https://www.db-thueringen.de/receive/dbt_mods_00049769 https://www.db-thueringen.de/receive/dbt_mods_00049769 doc-type:Article ScholarlyArticle ddc:530 2D materials excitonic photoluminescence integrated photonics nonlinear optics transition metal dichalcogenides Atomically thin transition metal dichalcogenides are highly promising for integrated optoelectronic and photonic systems due to their exciton‐driven linear and nonlinear interactions with light. Integrating them into optical fibers yields novel opportunities in optical communication, remote sensing, and all‐fiber optoelectronics. However, the scalable and reproducible deposition of high‐quality monolayers on optical fibers is a challenge. Here, the chemical vapor deposition of monolayer MoS 2 and WS 2 crystals on the core of microstructured exposed‐core optical fibers and their interaction with the fibers’ guided modes are reported. Two distinct application possibilities of 2D‐functionalized waveguides to exemplify their potential are demonstrated. First, the excitonic 2D material photoluminescence is simultaneously excited and collected with the fiber modes, opening a novel route to remote sensing. Then it is shown that third‐harmonic generation is modified by the highly localized nonlinear polarization of the monolayers, yielding a new avenue to tailor nonlinear optical processes in fibers. It is anticipated that the results may lead to significant advances in optical‐fiber‐based technologies. Chemical vapor deposition of monolayer MoS 2 and WS 2 on microstructured optical fibers is used to integrate atomically thin materials into optical fibers. This approach yields novel opportunities in integrated photonics. In two proof‐of‐concept experiments, excitation and collection of excitonic photoluminescence with the fiber modes and third‐harmonic enhancement due to nonlinear polarization of the monolayers is demonstrated. image 2020-11-24 Wiley 7 Seiten eng Advanced materials -- Adv. Mater -- 10.1002/(ISSN)1521-4095 -- 1521-4095 -- 0935-9648 -- 645299157 -- http://uri.gbv.de/document/gvk:ppn:269533958 -- 1474949x Open Access related to alliance or national license info:eu-repo/semantics/openAccess