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16:00 - 16:15
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Manuscript ID. 0493
Paper No. 2023-SAT-S0105-O001
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| Chi Ting Weng
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Nanoscaled Vibrational Strong Coupling with Atomically Thin Mid-Infrared Resonances
Chi Ting Weng, Jia-Wun Liaw, Chun-Yu Yang, Jin-Yen Lin, Chih-Yang Chang, Han-Siang Jhuang, Jui-Nung Liu, National Cheng Kung University (Taiwan)
We numerically demonstrate that plasmonic graphene nanoribbons (GNRs) can serve as an atomically thick open-nanocavity for vibrational strong coupling (VSC), exhibiting extraordinary cooperativity in the nanoscale. The behaviors of the molecule-GNR hybrid system are analytically depicted using the temporal coupled mode theory (TCMT), showing good agreement with the numerical simulations. The atomically thick resonators offer a new route alternative to the commonly used Fabry-Perot cavities for VSC.
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16:15 - 16:30
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Manuscript ID. 0557
Paper No. 2023-SAT-S0105-O002
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| Shyam Narayan Singh Yadav
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Trap State Passivated Perovskite Quantum Dots/Graphene-Based Hybrid Gate-Free Photodetector Functionalized by Morphologically Controlled Gold Nanocrystals
Shyam Narayan Singh Yadav, National Tsing Hua University (Taiwan); Chintam Hanmandlu, Academia Sinica (Taiwan); Dinesh Kumar Patel, National Taiwan University (Taiwan), Physikalisch-Technische Bundesanstalt (PTB) (Germany); Rajan Kumar Singh, National Taiwan University (Taiwan); Chun-Yen Chen, National Tsing Hua University (Taiwan); Yen-Yu Wang, Academia Sinica (Taiwan), National Taiwan University (Taiwan); Chih-Wei Chu, Academia Sinica (Taiwan); Chi-Te Liang, Chih-Ting Lin, National Taiwan University (Taiwan); Yu-Jung Lu, Academia Sinica (Taiwan), National Taiwan University (Taiwan); Ta-Jen Yen, National Tsing Hua University (Taiwan)
Perovskite quantum dots (PQDs) are a promising candidate for photodetection due to their optical, and electrical characteristics, alongwith cost-effective solution processability. However, their optoelectronic performances hinder by their weak light-matter interaction. Here, we hybridize PQDs with shaped plasmonic gold nanocrystals (AuNCs) and graphene to demonstrate a superior photodetector through a synergetic effect. Our experimental results indicate that shaped AuNCs all contribute to better photodetection behaviors due to trap state passivation and enhanced charge carrier densities with a longer lifetime compared to that of pristine PQDs. In particular, the PQDs/RD-AuNCs/Gr photodetector demonstrated a record-high responsivity among the PQDs/AuNCs/Gr-based electrostatic gate-free photodetectors.
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16:30 - 16:45
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Manuscript ID. 0792
Paper No. 2023-SAT-S0105-O003
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| Anand Hegde
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Rapid Height-Dependent Evolutions of Plasmonic Merons
Anand Hegde, Han-Ting Lin, Chen-Bin Huang, Institute of Photonics Technologies (Taiwan)
We numerically investigate the characteristics of plasmonic merons near a metallic surface, revealing a pivotal height-driven transformation from Neel to Bloch-type. This dynamic transition occurs within a specific height range, marked by rapid evolution. The interplay between plasmonic spin-textures controlled by surface plasmon polaritons in the near field and edge-scattered fields in the far field triggers this phenomenon.
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16:45 - 17:00
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Manuscript ID. 1052
Paper No. 2023-SAT-S0105-O004
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| Li-Ming Chiang
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Anion Transportation in Vapor and Solid Phases of Hybrid Metal Halide Perovskite Nanowires
Li-Ming Chiang, National Yang Ming Chiao Tung University (Taiwan), Academia Sinica (Taiwan); Wei Zhang, Tsung-Sheng Kao, National Yang Ming Chiao Tung University (Taiwan); Min-Hsiung Shih, Academia Sinica (Taiwan)
We initially employed the surface-initiated solution growth technique to synthesize perovskite nanowires. By using various ratios of methylammonium lead halide solutions, we successfully produced nanowires with halogen-mixed compositions. Analyzing the photoluminescence and X-ray diffraction characteristics provided us with comprehensive insights into the hybrid perovskite composition and the controllable light emission properties. To achieve precise control over the central emission wavelengths, we employed both vapor-phase and solid-phase anion exchange methods. This allowed us to finely adjust the proportions of halogen elements within the perovskite nanowires, opening up promising applications for these nanowires in areas such as light emission and sensing.
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