Results 111 to 120 of about 24,867 (278)

Ultrabroadband Excitation of Hot Carriers in Plasmonic Nanorods Revealed by Two‐Dimensional Electronic Spectroscopy

Advanced Optical Materials, EarlyView.
This work dissects the ultrafast response of polydisperse plasmonic nanorods using two‐dimensional electronic spectroscopy, uniquely combining temporal and spectral resolution. Our ultrabroadband pulses cover both transverse and longitudinal nanorods’ resonances, revealing sub‐200‐fs dynamics and distinct broadening mechanisms.
Andrea Schirato, Mattia Russo, Luca Moretti, Alessandro Molinelli, Laura Polito, Filippo Rossi, Giulio Cerullo, Giuseppe Della Valle, Margherita Maiuri   +8 more
wiley   +1 more source

Bound States in the Continuum in Metasurface Absorbers: A Comparison with Metasurfaces

Advanced Photonics Research, EarlyView.
Bound states in the continuum (BICs) offer a powerful mechanism for enhancing light–matter interactions. This work systematically investigates the radiation characteristics of BICs under both transmission and reflection configurations using multipolar analysis.
Guizhen Xu, Zhanqiang Xue, Jiang Du, Longqing Cong   +3 more
wiley   +1 more source

Atomistic Understanding of 2D Monatomic Phase‐Change Material for Non‐Volatile Optical Applications

Advanced Science, EarlyView.
Antimony is a promising monatomic phase‐change material. Scaling down the film thickness is necessary to prolong the amorphous‐state lifetime, but it alters the optical properties. The combined computational and experimental study shows that, as thickness decreases, the extinction coefficient and optical contrast are reduced in the near‐infrared ...
Hanyi Zhang, Xueqi Xing, Jiang‐Jing Wang, Chao Nie, Yuxin Du, Junying Zhang, Xueyang Shen, Wen Zhou, Matthias Wuttig, Riccardo Mazzarello, Wei Zhang   +10 more
wiley   +1 more source

ZIF‐67‐Confined Pd Single‐Atom Catalysts Implanted Into Polydopamine‐Modified Bamboo Microchannels for Robust Continuous‐Flow Hydrogenation

Advanced Science, EarlyView.
The report presents a facile room‐temperature method to stabilize Pd single‐atom catalysts within ZIF‐67 crystals during their formation. Despite an ultralow Pd loading (0.0014 wt%), the catalytic microreactor, featuring atomically dispersed Pd‐N4 sites in ZIF‐67, demonstrates superior robustness and maximized Pd utilization, significantly ...
Sisi Yao, Jiawei Han, Wenjun Zhang, Dengkang Guo, Shenjie Han, Yun Lu, Jingpeng Li   +6 more
wiley   +1 more source

Photoinduced suppression of the ferroelectric instability in PbTe

, 2015
The interactions between electrons and phonons drive a large array of technologically relevant material properties including ferroelectricity, thermoelectricity, and phase-change behaviour. In the case of many group IV-VI, V, and related materials, these
Bray, C., Chollet, M., Clark, J., Delaire, O., Fahy, S., Glownia, J. M., Henighan, T., Hoffmann, M., Jiang, M. P., Kozina, M., Lindenberg, A. M., May, A. F., Merlin, R., Murray, É. D., Reis, D. A., Sales, B. C., Sato, T., Savić, I., Trigo, M., Zalden, P., Zhu, D.   +20 more
core  

Influence of layer thickness on time domain Brillouin scattering oscillation amplitude in multilayer films

Journal of Applied Physics
This paper investigates the impact of a sample structure on the amplitude of time-domain Brillouin scattering (TDBS) oscillations using silicon wafers with different oxide layer thicknesses as an example. According to the calculation results based on transfer matrix theory and Green’s function, along with experimental results, we discovered that the ...
Enrui Zhang, Hongyuan Zhao, Zhiming Geng, Xuejun Yan, Xiaodong Xu, Jiayu Dai   +5 more
openaire   +1 more source

An Advanced High‐Performance Ultrafast Ammonium‐Ion Aqueous Battery Based on Dual‐Metal Redox Open Framework Molecular Magnet

Advanced Science, EarlyView.
The Prussian Blue Analogue molecular magnet KMnFeHCF is demonstrated as a high‐performance cathode for ultra‐fast aqueous ammonium‐ion batteries. A full cell using KMnFeHCF and graphite delivers ~71 mAh g−1 at 1.25 A g−1 and ~51 mAh g−1 at 2.2 A g−1, retaining 50% capacity after 1850 cycles. Its scalability, cycling stability, and low cost offer strong
Nilasha Maiti, Pramod Bhatt, Manoj K Sharma, Sher Singh Meena, Mayuresh D Mukadam, Soumen Samanta   +5 more
wiley   +1 more source

Measurement Accuracy Enhancement via Radio Frequency Filtering in Distributed Brillouin Sensing

Sensors, 2019
In this article, we demonstrate the noise reduction and signal to noise ratio (SNR) enhancement in Brillouin optical time-domain analyzers (BOTDA). The results show that, although the main noise contribution comes from the Brillouin interaction itself, a
Cheng Feng, Stefan Preussler, Jaffar Emad Kadum, Thomas Schneider   +3 more
doaj   +1 more source

Superelastic High‐Entropy Oxide Ceramic Aerogels for Thermal Superinsulation and Sealing at Extreme Conditions

Advanced Science, EarlyView.
A high‐entropy oxide ceramic of (Gd1/2Lu1/2)2(Ti1/3Zr1/3Hf1/3)2O7 is prepared through a molecular synthesis route of pyrolytic solid‐solution reactions. The architectured nanofiber aerogel manifests unprecedented thermomechanical properties, including superelastic compressibility of 98% from −196 to 1500 °C, and thermal superinsulation capacity (24.14 ...
Xiaoke Jiang, Tao Du, Hengzhong Fan, Junhong Liu, Yunfeng Su, Peng He, Hongxiang Chen, Litian Hu, Yongsheng Zhang, Qiangqiang Zhang   +9 more
wiley   +1 more source

Two Distinct Phonon Wave Effects Control Thermal Transport across the Coherent–Incoherent Regime in Superlattices

Advanced Science, EarlyView.
Thermal transport in smooth‐interface superlattices is studied using the phonon Wigner transport equation, which captures both particle‐like and wave‐like contributions. A minimum in cross‐plane thermal conductivity emerges with increasing period thickness, signaling a crossover from coherent to incoherent phonon transport.
Jin Yang, Jingyi Zhu, Alan J. H. McGaughey, Wee‐Liat Ong   +3 more
wiley   +1 more source