Results 61 to 70 of about 370,378 (203)

Photonic Time Crystals and Time‐Varying Electromagnetic Metamatter: A New Direction for Ultrafast Tunable Photonic and Microwave Materials and Devices

Advanced Science, EarlyView.
Photonic time crystals (PTCs) are systems in which electromagnetic parameters are modulated periodically in time, producing momentum bandgaps via temporal scattering rather than spatial Bragg processes. This review examines the theoretical frameworks, modeling, and computational tools for time‐varying media, and summarizes experimental demonstrations ...
Ranjan Kumar Patel, Shriram Ramanathan, Ronald P. Jenkins, Michael J. Carter   +3 more
wiley   +1 more source

Phase Diagrams and Piezoelectric Properties of Wurtzite Al1−x−yScxGdyN Heterostructural Alloys

Advanced Science, EarlyView.
This study demonstrates ferroelectricity and piezoelectric properties improvement of quaternary wurtzite Al1−x−yScxGdyN${\rm Al}_{1-x-y}{\rm Sc}_x{\rm Gd}_y{\rm N}$ films, guided by density functional theory calculations. Wurtzite Al1−x−yScxGdyN${\rm Al}_{1-x-y}{\rm Sc}_x{\rm Gd}_y{\rm N}$ films have a high optical bandgap, enhanced piezoelectric ...
Julia L. Martin, Cheng‐Wei Lee, Nate S.P. Bernstein, Thi Nguyen, Ande Bryan, Eli Cooper, John S. Mangum, Sage R. Bauers, Andriy Zakutayev, Keisuke Yazawa, Prashun Gorai, Rebecca W. Smaha   +11 more
wiley   +1 more source

Self‐Oscillation in Photochromic Thiazolothiazole‐Embedded Polymers

Advanced Photonics Research
Self‐Oscillatory behavior in soft matter/ambient interfaces is comparatively rare and less extensively characterized than in physical, astrophysical, or biological contexts.
Nuren Z. Shuchi, Tyler J. Adams, Naz F. Tumpa, Dustin Louisos, Tom Tiwald, Glenn D. Boreman, Michael G. Walter, Tino Hofmann   +7 more
doaj   +1 more source

Porous Ultralow‐κ sp2‐Bonded Boron Nitride Thin Films as Copper Diffusion Barriers

Advanced Science, EarlyView.
Porous sp2‐bonded boron nitride (p‐BN) thin films with an ultralow dielectric constant (κ = 1.77) are directly grown on Si substrates via RF magnetron sputtering. The films feature uniform nanopores (1.85 nm), high mechanical stability, hydrophobicity, and excellent Cu diffusion barrier performance even at 3 nm thickness, offering a promising solution ...
Caiyun Liu, Ze Long, Zhongyuan Han, Yingying Guo, Yuning Ding, Tianhao Guo, Yuting Tang, Runzhi An, Haoran Ma, Jishan Liu, Hongwei Liang, Hong Yin   +11 more
wiley   +1 more source

Metasurface‐Enabled Helical Wavefront Fingerprint Metrology for Quantitative Retrieval of Liquid Optical Constants

Advanced Science, EarlyView.
A metasurface‐enabled helical wavefront fingerprint (MHWF) paradigm is proposed for quantitative and specific retrieval of a liquid medium's refractive index and extinction coefficient. The liquid's complex dielectric response governs the wavefront evolution of the metasurface‐generated focused vortex beam, forming a distinctive three‐dimensional ...
Yuting Zhou, Hongliang Li, Simeng Li, Feiyu Jiao, Yansong Du, Jin Tae Kim, Sang‐Shin Lee, Duk‐Yong Choi, Fei Ding, Xuechao Yu, Xun Guan   +10 more
wiley   +1 more source

Interfacial Interaction‐Engineered Dual Lithiophilic Ultrathin Interlayers for Dendrite‐Suppressed Lithium Metal Textile Anodes

Advanced Science, EarlyView.
Ultrathin lithiophilic interlayers engineered on a 3D textile electrode and separator cooperatively regulate interfacial Li nucleation and Li+ transport, leading to homogeneous Li plating and mitigated dendrite formation. The resulting dual‐interfacial design provides long‐term cycling stability, improved full‐cell durability, and a scalable pathway ...
Chanseok Lee, Donghyeon Nam, Sang Hun Baeck, Boyeon Kim, Yongkwon Song, Jaemin Kim, Daegun Kim, Jun Hyuk Moon, Yoon Jang Chung, Hyeong Jun Kim, Seoin Back, Yongmin Ko, Jinhan Cho   +12 more
wiley   +1 more source

Electrically Tunable Graphene‐Metal Hybrid Metasurfaces for High‐Efficiency, Broadband Mid‐Infrared Transmission Modulation

Advanced Science, EarlyView.
A graphene‐metal hybrid transmissive metasurface enables electrically tunable mid‐infrared transmission modulation through ionic gel top gating. By combining graphene with a metallic slit metasurface, high modulation efficiency and broadband operation are achieved simultaneously, demonstrating efficient electrical control of mid‐infrared transmission ...
Heonhak Ha, Jinseok Kong, Junhyung Kim, Jiwon Kang, Min Seok Jang   +4 more
wiley   +1 more source

Infrared Dielectric Function of Dragonfly Dielectric Ink 1092 Polymer from 300 cm⁻¹ to 6000 cm⁻¹

Optics
This work focuses on the characterization of the complex dielectric function of a polymer material, which is UV-cured dielectric ink 1092, used in the DragonFly IV 3D inkjet printer.
Dustin Louisos, Joseph Engeland, Nuren Z. Shuchi, Samuel I. Gatley, John F. Federici, Benjamin Thomas, Ian Gatley, Glenn D. Boreman, Tino Hofmann   +8 more
doaj   +1 more source

spectroscopic ellipsometry [PDF]

, 2005
In situ spectroscopic ellipsometry has been employed to determine the properties of titanium nitride (TiN) films during plasma-assisted atomic layer deposition by alternating TiCl4 precursor dosing and H2–N2 plasma exposure.
Heil, S.B.S., Langereis, E., Roozeboom, F., W. M. M. Kessels, M. C. M. van de Sanden, A. Kemmeren, S. B. S. Heil, Kemmeren, A., Sanden, van de, M.C.M., F. Roozeboom, Kessels, W.M.M., E. Langereis   +11 more
core   +1 more source

Restoring Endothelial Mitochondrial Homeostasis With a Bioactive Nanoshield Promotes Vascular Regeneration on Cardiovascular Implants

Advanced Science, EarlyView.
A bioactive poly(citrate‐polyglycol‐procyanidin) (PCGP) nanoshield is developed for cardiovascular implants to restore endothelial mitochondrial homeostasis following vascular injury. By preserving mitochondrial integrity, re‐establishing metabolic balance, and activating PI3K/Akt/eNOS‐NO signaling, the PCGP interface promotes functional endothelial ...
Xiyu Liu, Wen Zhang, Lunxin Liu, Lan Gui, Yumei Qin, Xiaohui Yang, Longjian Zhang, Chaohua Wang, Jinpeng Hu, Gaoyang Guo, Qing Jiang, Jin Wang, Li Yang, Bo Zhang, Yunbing Wang   +14 more
wiley   +1 more source