Výsledky vyhledávání - "Gia Quyet Ngo"

In-fibre second-harmonic generation with embedded two-dimensional materials

Autor: Gia Quyet Ngo, Emad Najafidehaghani, Ziyang Gan, Sara Khazaee, Malte Per Siems, Antony George, Erik P. Schartner, Stefan Nolte, Heike Ebendorff-Heidepriem, Thomas Pertsch, Alessandro Tuniz, Markus A. Schmidt, Ulf Peschel, Andrey Turchanin, Falk Eilenberger

Publikováno v: Nature Photonics. 16:769-776

Silica-based optical fibres are a workhorse of nonlinear optics, providing ready access to a range of nonlinear phenomena including solitons and self-phase modulation. However, they have one fundamental limitation: due to the amorphous nature of sili

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0542dcd5f83cce21e29a43d7234e495a
https://doi.org/10.1038/s41566-022-01067-y

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Direct growth of monolayer MoS2 on nanostructured silicon waveguides

Publikováno v: Nanophotonics. 11:4397-4408

We report for the first time the direct growth of molybdenum disulfide (MoS2) monolayers on nanostructured silicon-on-insulator waveguides. Our results indicate the possibility of utilizing the Chemical Vapour Deposition (CVD) on nanostructured photo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4ba9ed15858f3ac7724e4312eed81df3
https://doi.org/10.1515/nanoph-2022-0235

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Akademický článek

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Scalable Integrated Waveguide with CVD-Grown MoS2 and WS2 Monolayers on Exposed-Core Fibers

Autor: Alessandro Tuniz, Antony George, Stephen C. Warren-Smith, Andrey Turchanin, Emad Najafidehaghani, Heike Ebendorff-Heidepriem, Gia Quyet Ngo, Tobias Bucher, Tilman Lühder, Sina Saravi, Falk Eilenberger, Heiko Knopf, Ziyang Gan, Markus A. Schmidt

Publikováno v: Scopus-Elsevier

Transition-metal dichalcogenides [1] (TMDs) are particularly appealing for photonics due to their rich photophysical effects and strong light-matter-interaction per unit length [1] . Two-dimensional (2D) TMDs also exhibit strong optical nonlinearity

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fb820105c896ab50b55a01d64a523940
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9542266

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Second Harmonic Generation in monolayer WS2 with double resonant Bragg-Cavities

Autor: Antony George, Ulrike Schulz, Mathias Zilk, Ziyang Gan, Maximilian Weissflog, Sven Schröder, Fatemeh Alsadat Abtahi, Emad Najafidehaghani, Simon Bernet, Falk Eilenberger, Heiko Knopf, Andrey Turchanin, Tobias Vogl, Gia Quyet Ngo

Publikováno v: 2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).

Transition metal dichalcogenides (TMDCs) are semiconducting 2D-materials with a direct bandgap in a range of 1.0 to 2.5 eV [1] . They exhibit strong second-order nonlinearity per unit thickness, making them interesting for nonlinear light-conversion

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e40c427b3a9b2db1e8ae1baeb9771392
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9542129

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Enhanced Light-Matter Interaction in TMDC-Materials by Integration in Resonant Layer Architectures

Autor: Heiko Knopf, Gia Quyet Ngo, Fatemeh Alsadat Abtahi, Simon Bernet, Antony George, Emad Najafidehaghani, Ziyang Gan, Lukas Lackner, Christoph Rupprecht, Hangyong Shan, Maximilian Weissflog, Tobias Vogl, Andrey Turchanin, Ulrike Schulz, Sven Schröder, Christian Schneider, Sven Höfling, Falk Eilenberger

Publikováno v: Frontiers in Optics + Laser Science 2021.

We demonstrate double-resonantly enhanced SH harmonic generation at 402 ± 0.5 nm of encapsulated WS2-flakes, as shown in Figure 1b+c, pumped at 805 ± 1 nm, including quadratic energy dependency and polarization dependency and discuss possible gener

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a84127a89934648d768491fb0bff3ec4
https://doi.org/10.1364/fio.2021.fm1b.7

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Second-Harmonic Generation in Directly-Grown MoS2 Monolayers on Exposed-Core Fibers

Autor: Gia Quyet Ngo, Emad Najafidehaghani, Ziyang Gan, Sara Khazaee, Antony George, Ulf Peschel, Alessandro Tuniz, Heike Ebendorff-Heidepriem, Markus A. Schmidt, Andrey Turchanin, Falk Eilenberger

Publikováno v: Frontiers in Optics + Laser Science 2021.

We report the substantial second-harmonic generation produced from exposed core optical fibers, coated with single-layer MoS2 crystals, grown by a one-step CVD process. This second-order process is tunable and supported by intermodal phase matching.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::77d5d9fb0549a84297266c9e3045aa0b
https://doi.org/10.1364/fio.2021.jth5a.86

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Photoluminescence and Third Harmonic Generation in Directly-Grown MoS2 and WS2 Exposed-Core Fibers

Autor: Christof Neumann, Stephen C. Warren-Smith, Heike Ebendorff-Heidepriem, Markus A. Schmidt, Alessandro Tuniz, Nils C. Geib, Antony George, Emad Najafidehaghani, Tobias Bucher, Andrey Turchanin, Falk Eilenberger, Gia Quyet Ngo, Tilman Lühder, Heiko Knopf, Robin Klaus Tristan Schock

Publikováno v: Frontiers in Optics / Laser Science.

We use exposed core optical fibers, coated with single-layer MoS2 and WS2 crystals, grown in place, to demonstrate in-fiber exciton excitation, photoluminescence collection, and enhanced third harmonic generation.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b6b932f3ed47b72376cf2db38e3c7a8a
https://doi.org/10.1364/fio.2020.ftu2d.5

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Common Pulse Retrieval Algorithm: a Fast and Universal Method to Retrieve Ultrashort Pulses

Autor: Falk Eilenberger, Gia Quyet Ngo, Nils C. Geib, Heiko Knopf, Thomas Pertsch

Publikováno v: Conference on Lasers and Electro-Optics.

In this work we present a common pulse retrieval algorithm (COPRA) that can be universally applied to many pulse measurement methods and compares favorably in terms of speed and accuracy to existing approaches.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7fcb46d767f8b6f06a23d9888099fcdd
https://doi.org/10.1364/cleo_si.2020.sm3h.3

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