Article
Chemistry, Physical
Chih-Feng Wang, Patrick Z. El-Khoury
Summary: The research demonstrates that four-wave mixing at plasmonic tip-sample nano-junctions can visualize plasmonic fields with sub-2 nm spatial resolution under ambient laboratory conditions. By utilizing specific techniques, the four-wave mixing signal can be further enhanced, paving the way for visualizing chemical transformations and coherent electronic and vibrational dynamics with femtosecond temporal and few-nanometer spatial resolution under ambient conditions.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Physics, Multidisciplinary
Jiangpeng Wang, Jingjing Zhang, Hao Gao, Xiaojian Fu, Di Bao, Tie Jun Cui
Summary: In this work, a high-Q-factor and high-sensitivity hybridized spoof localized surface plasmon (LSP) sensor and a mixed-resolution algorithm are proposed. The sensor consists of two concentric LSP structures with corrugated rings coupled to each other, achieving high Q-factor and sensing figure of merit (FoM). The mixed-resolution algorithm effectively enhances the Q-factor and sensing FoM.
FRONTIERS IN PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Guang Yang, Chi Yang, Yage Chen, Boyu Yu, Yali Bi, Jiangshan Liao, Haozheng Li, Hong Wang, Yuxi Wang, Ziyu Liu, Zongsong Gan, Quan Yuan, Yi Wang, Jinsong Xia, Ping Wang
Summary: Far-field super-resolution optical microscopies have been successful in life science but less applied in material science. A new antiphase demodulation pump-probe super-resolution microscope was introduced for direct optical inspection of integrated circuits, enabling label-free imaging of copper interconnects on a CPU chip. This label-free super-resolution DPP optical microscopy offers possibilities for easy, fast, and large-scale electronic inspection in the IC design and manufacturing pipeline.
Article
Multidisciplinary Sciences
Zi-Lan Deng, Tan Shi, Alex Krasnok, Xiangping Li, Andrea Alu
Summary: Experimental demonstration shows that electromagnetic skyrmions based on magnetic localized spoof plasmons exhibit high topological robustness, paving the way for the development of flexible sensors, wearable electronics, and ultra-compact antennas. These skyrmions maintain stability on materials of different shapes, demonstrating flexible texture characteristics.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Steven Gottlieb, Louis Pigard, Yu Kyoung Ryu, Matteo Lorenzoni, Laura Evangelio, Marta Fernandez-Regulez, Colin D. Rawlings, Martin Spieser, Francesc Perez-Murano, Marcus Mueller, Armin W. Knoll
Summary: The study presents a probe-based thermal-imaging technique that can achieve sub-10 nm lateral resolution and sub-10 ms pixel rate. Through investigating microphase-separated PS-b-PMMA block copolymers, the study reveals asymmetry in the heat flux signal and the heat flux ratio between both polymers in different geometries. Comparison with coarse-grained molecular simulations shows enhanced transport along the macromolecular backbone and Kapitza resistance at internal interfaces of the self-assembled structure.
Article
Optics
Jibiao Wu, Lianglun Cheng, Meiyun Chen, Tao Wang, Zhuowei Wang, Heng Wu
Summary: A super-resolution infrared imaging method is proposed with a multi-receptive field information distillation network, optimizing feature extraction progress and achieving high-quality image reconstruction and 2x super-resolution. The method outperforms four state-of-the-art SR algorithms in visual quality with less training images required.
OPTICS AND LASERS IN ENGINEERING
(2021)
Article
Nanoscience & Nanotechnology
Jie Wang, Zhenqiu Wu, Junhan Wei, Junzheng Hu, Huikang Yu, Guangxu Su, Lumang Hu, Xiaodong Yan, Peng Zhan, Fanxin Liu
Summary: Research shows that leveraging in situ sputter etching and sputter deposition of tetrahedral amorphous carbon (ta-C) film can improve the plasmonic activity of aluminum. This method effectively reduces the oxidized layer of aluminum films, keeping them oxidation-free. The ta-C film, with a denser structure, higher permittivity, and better biocompatibility, outperforms the naturally passivated Al2O3 layer and effectively enhances the plasmonic response of aluminum.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Optics
Haitang Yang, Esther Y. H. Lin, Kiriakos N. Kutulakos, George V. Eleftheriades
Summary: Super-oscillatory imaging is a technique that can go beyond the diffraction limit. This study provides a comprehensive theoretical analysis and experimental validation of the integration of super-oscillatory imaging into existing microscopes and telescopes, as well as the operational limits of the approach.
Review
Chemistry, Analytical
Xiaoxiao Jiang, Lu Kong, Yu Ying, Qiongchan Gu, Jiangtao Lv, Zhigao Dai, Guangyuan Si
Summary: Super-resolution optical imaging has become a hot spot in promoting nanotechnology and biotechnology research by overcoming the diffraction limit. Graphene, with its unique properties, has emerged as a meritorious candidate in high-resolution imaging. This article summarizes the working principle of graphene-assisted imaging devices and reviews the recent advances in super-resolution optical imaging based on graphene for both near-field and far-field applications.
Article
Chemistry, Physical
Krishna Prasad Koirala, Jingxuan Ge, Ramki Kalyanaraman, Gerd Duscher
Summary: This study presents the first evidence of localized interface plasmons in CoAg bimetallic nanoparticles using scanning transmission electron microscopy-electron energy-loss spectroscopy. The oscillation frequency of localized interface plasmons falls between in-plane dipole localized surface plasmon resonance (LSPR) mode and quasiplanar mode, showing stronger resonance compared to in-plane dipole LSPR. The direct detection of plasmons confined to the interface region could drive future engineering for improved plasmonic activity in bimetallic interfaces.
Article
Chemistry, Multidisciplinary
Eduardo J. C. Dias, Ivan Madan, Simone Gargiulo, Francesco Barantani, Michael Yannai, Giovanni Maria Vanacore, Ido Kaminer, Fabrizio Carbone, F. Javier Garcia de Abajo
Summary: We develop a comprehensive microscopic theory to predict the spatiotemporal dynamics of laser-pulse-induced plasmas, and study the characteristics of terahertz fields generated through electron emission, metal screening, and plasma cloud interactions. We also investigate the interaction with femtosecond electron beams and explain recent ultrafast electron microscopy experiments. Our work contributes fundamental insight into the generation and dynamics of micron-scale electron plasmas and their interaction with ultrafast electron pulses.
NANOSCALE ADVANCES
(2023)
Article
Chemistry, Multidisciplinary
Zhongwei Man, Zheng Lv, Zhenzhen Xu, Jiannian Yao, Hongbing Fu
Summary: This study demonstrates the construction of supramolecular nanoassemblies (SNAs) through host-guest interactions between isopercolic acid derivatives (IADs) and cyclodextrin (CD), resulting in improved fluorescence quantum yield and suppression of nonradiative relaxation pathways. The SNAs showed high stimulated emission efficiency and excellent STED imaging performance, paving a new pathway for the development of novel high-performance STED probes.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Maritza Mujica, Amar Mohabir, Pralav P. Shetty, Wesley R. Cline, Daniel Aziz, Matthew T. McDowell, Victor Breedveld, Sven Holger Behrens, Michael A. Filler
Summary: In this study, we demonstrate the growth of single-crystalline i-Si, i-Si/n-Si, and SixGe1-x/SiyGe1-y nanowires via the Geode process. The use of microcapsules improves scalability while maintaining programmability of the nanowires. Heat and mass transport limitations introduced by the microcapsule wall are shown to be negligible, allowing for consistent compositional control. The efficient transport also minimizes structural variations in nanowires grown in microcapsules with different sizes and wall thicknesses.
Article
Materials Science, Multidisciplinary
Hajun Yoo, Hongki Lee, Woo Joong Rhee, Gwiyeong Moon, Changhun Lee, Seung Ah Lee, Jeon-Soo Shin, Donghyun Kim
Summary: Nanospeckle illumination microscopy (NanoSIM) utilizes disordered metallic nanocomposite island substrates to achieve super-resolution imaging. Experimental studies show an improvement of spatial resolution by over three times, with applications in imaging nanoscale objects.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Thermodynamics
Cun-Hai Wang, Hao Bian, Chong -Chao Pan, Ze-Yi Jiang
Summary: We propose a near-field thermal rectifier based on the InSb/graphene/3C-SiC-nanowire heterostructure, which can significantly enhance the performance of thermal rectifiers by utilizing near-field radiative heat transfer. The rectifier consists of two terminals, one of which is an InSb slab with a graphene-coated bottom, and the other is a 3C-SiC nanowire array with a graphene cover on top. By using fluctuational electrodynamics, we calculate the radiation heat flux and the corresponding thermal rectification efficiency (TRE). The results show that the strong asymmetric surface plasmon polaritons (SPPs) and hyperbolic phonon polaritons (HPPs) guarantee a robust TRE in both forward and reverse heat transfer scenarios.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
