Dr. Komla D. Nomenyo Profile

Dr. Komla D. Nomenyo

at Univ de Technologie Troyes

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Author

Publications (9)

Proceedings Article | 5 October 2023 Presentation

Compact and low cost interference lithography based on external cavity diode laser and prism

Daiki Matsubayashi, Agnieszka Gwiazda, Komla Nomenyo, Hiroshi Kano, Gilles Lérondel

Proceedings Volume PC12652, PC1265206 (2023) https://doi.org/10.1117/12.2680560

KEYWORDS: Semiconductor lasers, Prisms, Lithography, Mirrors, Reflection, Physical coherence, Optical pumping, Optical coherence, Nd:YAG lasers, Nanostructures

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Proceedings Article | 1 August 2021 Presentation

Wafer-scale, well-aligned growth of ZnO nanowires via chemical bath deposition: Assessment of Zinc ions contribution and other limiting factors

Anisha Gokarna, Yu-Chen Huang, Junze Zhou, Komla Nomenyo, Rodica Elena Ionescu, Gilles Lérondel

Proceedings Volume 11801, 118010C (2021) https://doi.org/10.1117/12.2594782

KEYWORDS: Zinc oxide, Nanowires, Ions, Zinc, Semiconducting wafers, Silicon, Photovoltaics, Photocatalysis, Sensors, Optoelectronics

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Proceedings Article | 1 August 2021 Presentation

Babinet’s principle applied to the design of electrically tunable mid-infrared plasmonic antenna metasurface

Victor Aaron Verdugo Gutierrez, Komla Nomenyo, Gilles Lérondel, Alexandre Vial, Rafael Salas-Montiel

Proceedings Volume 11796, 1179604 (2021) https://doi.org/10.1117/12.2594108

KEYWORDS: Plasmonics, Graphene, Mid-IR, Antennas, Finite-difference time-domain method, Thermography, Silicon, Optical properties, Gold, Optical antennas

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Proceedings Article | 17 September 2018 Presentation

Phenomenological modeling of light transmission through ZnO nanowires arrays (Conference Presentation)

Junze Zhou, Loïc Le Cunff, Komla Nomenyo, Thierry Pauporté, Gilles Lérondel

Proceedings Volume 10727, 1072705 (2018) https://doi.org/10.1117/12.2323538

KEYWORDS: Nanowires, Zinc oxide, Quantum electronics, Geometrical optics, Energy transfer, Nanomaterials, Semiconductors, Nanorods, Excitons, Refractive index

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Proceedings Article | 17 September 2018 Presentation

Giant green emission enhancement of ZnO through desulfurization process (Conference Presentation)

Junze Zhou, Komla Nomenyo, Adam Schwartzberg, Gilles Lérondel

Proceedings Volume 10720, 1072007 (2018) https://doi.org/10.1117/12.2323373

KEYWORDS: Zinc oxide, Oxygen, Optical properties, Luminescence, Ultraviolet radiation, Visible radiation, Nanowires, Structural analysis, Morphological analysis, Statistical analysis

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Proceedings Article | 3 November 2016 Presentation

ZnO top-down structuring for UV photonic applications (Conference Presentation)

Komla Nomenyo, Clotaire Chevalier-César, Anna Rumyantseva, Anisha Gokarna, Agnieszka Gwiazda, Gilles Lérondel

Proceedings Volume 9926, 99260U (2016) https://doi.org/10.1117/12.2238154

KEYWORDS: Ultraviolet radiation, Zinc oxide, Holography, Electron beam lithography, Gallium nitride, Reactive ion etching, Nickel, Group II-VI semiconductors, Indium gallium nitride, Excitons

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Proceedings Article | 5 October 2015 Presentation

Enhanced luminescence excitation via efficient optical energy transfer (Presentation Recording)

Roy Aad, Komla Nomenyo, Bogdan Bercu, Christophe Couteau, Vincent Sallet, David Rogers, Michael Molinari, Gilles Lérondel

Proceedings Volume 9545, 95450J (2015) https://doi.org/10.1117/12.2190818

KEYWORDS: Luminescence, Energy transfer, Light sources and illumination, Quantum dots, Waveguides, Polymer thin films, Polymers, Nanostructuring, Internal quantum efficiency, Absorption

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Luminescent nanoscale materials (LNMs) have received widespread interest in sensing and lighting applications due to their enhanced emissive properties. For sensing applications, LNMs offer improved sensitivity and fast response time which allow for lower limits of detection. Meanwhile, for lighting applications, LNMs, such as quantum dots, offer an improved internal quantum efficiency and controlled color rendering which allow for better lighting performances. Nevertheless, due to their nanometric dimensions, nanoscale materials suffer from extremely weak luminescence excitation (i.e. optical absorption) limiting their luminescence intensity, which in turn results in a downgrade in the limits of detection and external quantum efficiencies. Therefore, enhancing the luminescence excitation is a major issue for sensing and lighting applications. In this work, we report on a novel photonic approach to increase the luminescence excitation of nanoscale materials. Efficient luminescence excitation increase is achieved via a gain-assisted waveguided energy transfer (G-WET). The G-WET concept consists on placing nanoscale materials atop of a waveguiding active (i.e. luminescent) layer with optical gain. Efficient energy transfer is thus achieved by exciting the nanoscale material via the tail of the waveguided mode of the active layer emission. The G-WET concept is demonstrated on both a nanothin layer of fluorescent sensitive polymer and on CdSe/ZnS quantum dots coated on ZnO thin film, experimentally proving up to an 8-fold increase in the fluorescence of the polymer and a 3-fold increase in the luminescence of the CdSe/ZnS depending of the active layer emission regime (stimulated vs spontaneous emission). Furthermore, we will discuss on the extended G-WET concept which consists on coating nanoscale materials on a nanostructured active layer. The nanostructured active layer offers the necessary photonic modulation and a high specific surface which can presumably lead to a more efficient G-WET concept. Finally, the efficiency as well as the observation conditions of the GWET will be discussed and compared with more conventional charge transfer or dipole-dipole energy transfer.

Proceedings Article | 5 October 2015 Presentation

Highly efficient excitonic emission of CBD grown ZnO micropods (Presentation Recording)

Roy Aad, Anisha Gokarna, Komla Nomenyo, Patrice Miska, Wei Geng, Christophe Couteau, Gilles Lérondel

Proceedings Volume 9545, 95450D (2015) https://doi.org/10.1117/12.2190414

KEYWORDS: Zinc oxide, Crystals, Thin films, Nanostructures, Internal quantum efficiency, Phonons, Excitons, Diodes, Chemical fiber sensors, Solar cells

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Proceedings Article | 11 September 2013 Paper

Strategies for self-organization of Au nanoparticles assisted by copolymer templates

T. Maurer, Aurélien Sarrazin, A. Plaud, J. Béal, R. Nicolas, S. Lamarre, J. Proust, K. Nomenyo, Z. Herro, M. Kazan, G. Lerondel, J. Plain, P.-M. Adam, A.-M. Ritcey

Proceedings Volume 8809, 88092E (2013) https://doi.org/10.1117/12.2025144

KEYWORDS: Gold, Nanoparticles, Polymethylmethacrylate, Etching, Thin films, Annealing, Refractive index, Picosecond phenomena, Sensors, Reactive ion etching

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Showing 5 of 9 publications

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