Results 71 to 80 of about 34,611 (261)

When Poor Exciton Dissociation Limits Photocurrents in Organic Solar Cells: Why Low Offset Non‐Fullerene Acceptor Blends Can't Be Efficient

Advanced Materials, EarlyView.
The energetic offset between the donor and the acceptor components in organic photoactive layers is central to the tradeoff between photovoltage and photocurrent losses. This Perspective covers the most important issues surrounding this topic in non‐fullerene acceptor blends, from the difficulty of accurately determining state energies and driving ...
Dieter Neher, Manasi Pranav
wiley   +1 more source

Wideband capacitively coupled silicon modulator with barium titanate cladding

JPhys Photonics
Standard silicon modulators rely on the interaction between an optical signal and an electrical signal exploiting the plasma dispersion effect. Optical modes in such modulators are confined exploiting high refractive index contrast rib waveguides and ...
Ahmed Shariful Alam, Md Akibul Islam, Tobin Filleter, J Stewart Aitchison   +3 more
doaj   +1 more source

Bandwidth Enhancement of a V-Band Klystron with Stagger-Tuned Multiple Radial Re-Entrant Cavities. [PDF]

Sensors (Basel), 2023
Kumar MS, Maity S, Mandal S, Pal D, Koley C, Bandyopadhyay AK.   +5 more
europepmc   +1 more source

Unveiling Exsolution‐Induced Giant Electronic and Magnetic Property Changes in Non‐Stoichiometric Titanate Perovskite Thin Films

Advanced Materials, EarlyView.
A giant insulator to metal transition and emergent superparamagnetism are revealed by nanoparticle exsolution in non‐stoichiometric titanate perovskite thin films. By combining transport, synchrotron spectroscopy, and first‐principles calculations, this work reveals how defect reconfiguration and lattice reconstruction fundamentally reshape electronic ...
Sungil Kim, June Ho Lee, Yaolong Xing, Dongchang Kim, Haeseong Jeong, Mongjun Jeong, Manuel Valvidares, Stuart S. P. Parkin, Sang Ho Oh, Donghwa Lee, Hyojin Yoon, Hyeon Han   +11 more
wiley   +1 more source

High-Resolution Reconstruction of Seismic Data with Cycle-Consistent Adversarial Network

Applied Sciences
High-resolution seismic reconstruction is a challenging inverse problem because field seismic traces are inherently band-limited and their high-frequency components are further degraded by source bandwidth limitations, acquisition conditions, random ...
Si-Yi Chen, Ming Yang
doaj   +1 more source

Phase Engineering of Nanomaterials (PEN): Evolution, Current Challenges, and Future Opportunities

Advanced Materials, EarlyView.
This review summarizes the synthesis, phase transition, advanced characterization spanning ex situ to in situ and operando techniques, and diverse applications of phase engineering of nanomaterials (PEN). It further outlines key challenges and future opportunities, such as phase stability, architecture control, and artificial intelligence (AI)‐driven ...
Ye Chen, Zhanxi Fan, Jingjie Ge, Qiyuan He, Zhuangchai Lai, Jiawei Liu, Chaoliang Tan, Hua Zhang   +7 more
wiley   +1 more source

Chaos bandwidth enhancement via optical injection and direct modulation of semiconductor lasers

Shenzhen Daxue xuebao. Ligong ban
A scheme for enhancing the chaos bandwidth by directly modulating semiconductor lasers subject to optical injection is proposed. A unidirectional master-slave configuration is constructed using two free-running semiconductor lasers. By introducing direct
SHANG Jinhan, XIONG Haokai, ZHANG Jianguo, LI Pu   +3 more
doaj   +1 more source

Bandwidth Enhancement and Generation of CP of Yagi-Uda-Shape Feed on a Rectangular DRA for 5G Applications. [PDF]

Micromachines (Basel), 2022
Bari I, Iqbal J, Ali H, Rauf A, Bilal M, Jan N, Illahi U, Arif M, Khan MA, Ghoniem RM.   +9 more
europepmc   +1 more source

Directing Near‐Perfect (001) Orientation in Wafer‐Scale BiOI Thin Films via Halide‐Mediated van der Waals Stacking

Advanced Materials, EarlyView.
Our work introduces a new framework that fundamentally changes how orientation in bismuth oxyhalide systems is approached. Comprehensive experiments, backed by theoretical models, reveal the pivotal role of halide anions to modify the van der Waals stacking energies required to direct orientation. Our method enables the fabrication of near perfect (001)
Gabriel Aygur, Ashakiran Maibam, Hayden Tuohey, Tony Nguyen, Mei Xian Low, Sumeet Walia, Zijun (June) Yong, Ravichandar Babarao, Daniel Gomez, Enrico Della Gaspera, Joel van Embden   +10 more
wiley   +1 more source

Capacitively Coupled Silicon Modulator Fabricated on the Standard Silicon-on-Insulator Platform

IEEE Photonics Journal
Silicon-on-insulator (SOI) based silicon modulators are essential for modern optical communication links. Almost all these modulators are based on a rib waveguide structure.
Ahmed Shariful Alam, Hao Sun, Joyce K. S. Poon, Jose Azana, J. Stewart Aitchison   +4 more
doaj   +1 more source