ニュース＆トピックス
セミナーのお知らせ: Gilles Lerondel氏 (Full Professor, University of Technology of Troyes)
以下のとおりセミナーを開催いたします。皆様のご参加をお待ちしています。
UTriplセミナー
・ALICeセミナー
GMSIセミナー
・WINGS CFSセミナー
TACMIコンソーシアムオープンセミナー
日時：２０２６年７月８日（水）13:30～15:00
場所：東京大学理学部1号館2階287号室 および ZOOM（どちらも事前登録制）
講演者：Gilles Lerondel氏
(Full Professor, University of Technology of Troyes)
講演題目:Sustainable Functional Nanophotonics and Nanophotonics for Sustainability
Abstract
Following a brief introduction to nanophotonics, defined as the control of light?matter interactions at the nanoscale, two complementary approaches towards sustainability first in the context of solid-state lighting, will be presented.
The first approach focuses on improving the recyclability of the current LED-based technology, which has already enabled energy savings of up to 70% compared to incandescent lighting. We will here demonstrate how alternative disassembly techniques based on energy pulse fragmentation can significantly enhance recyclability. Applied to LED bulbs, this method achieves recycling rates exceeding 80%, well above conventional crushing techniques.
The second, more forward-looking approach relies on three eco-conception-inspired principles: the use of multifunctional and abundant materials, such as ZnO and lead-free perovskite oxides, preferably processed via simple solution-based techniques; the use of efficient materials and processes; and the minimization of material consumption. In this context, two-dimensional transition metal dichalcogenides (2D TMDs) emerge as particularly promising, provided their intrinsic properties are preserved. A novel integration approach based on nanostructured substrates will be presented, along with illustrative examples of simple devices such as photodetectors.
Finally, to provide a broader overview of the group’s research, we will also present the development of optical surfaces, including metasurfaces, for security applications such as optical identification. This part highlights the importance of low-cost, simple, and large-scale compatible nanofabrication techniques such as roll-to-roll which in turns are essential for the development of sustainable technologies.
“Integrated freestanding two‐dimensional transition metal dichalcogenides”
Advanced Materials 29 (18), 1700308 (2017).
“Ultrahigh Photosensitivity Based on Single-Step Lay-on Integration of Freestanding Two-Dimensional Transition-Metal Dichalcogenide”, ACS nano 18 (5), 4432-4442 (2024)
“Engineering of diffuse structural colors”, Advanced Optical Materials 12 (15), 2302165 (2025).
使用言語：English/英語
紹介教員：小西 邦昭
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