Results 121 to 130 of about 137,995 (220)

Simulation of optoelectronic oscillator injection locking, pulling & spiking phenomena

Scientific Reports
Complex envelope and reduced phase simulation models describing the dynamical behaviour of an optoelectronic oscillator (OEO) under injection by an external source are described. The models build on the foundations of a previously reported delay integral/
Abhijit Banerjee, Trevor James Hall
doaj   +1 more source

One‐Shot Pd(II)‐Catalyzed Multiple C–H Activation Enables Modular Construction of Fluorenylidene Oxindole‐Based Multi(Polycyclic) Aromatic Enes

Chemistry – A European Journal, EarlyView.
A one‐shot Pd(II)‐catalyzed C─H activation strategy enables the rapid conversion of simple linear propiolamides into structurally diverse mono‐, di‐, and tri‐olefin‐bridged MPAEs. This cascade process orchestrates up to six sequential C–H activations in a single operation, providing streamlined access to highly conjugated architectures.
Haiyu Wang, Kouki Sakata, Takuma Sato, Masahiro Terada, Tienan Jin   +4 more
wiley   +1 more source

Thin‐film lithium niobate photonics: Frontiers in millimeter‐wave and terahertz generation and integrated applications

InfoScience
As 6G communications, high‐resolution imaging, and precision sensing push the boundaries of the electromagnetic spectrum, the “terahertz (THz) gap” has transformed from a scientific curiosity into a critical industry bottleneck.
Jianfeng Xiong, Zhenyu Wang, Xu Li, Guo Tang, Sizhe Wang, Jiyuan Huang, Guochao Wang, Shuhua Yan, Wenzhao Sun   +8 more
doaj   +1 more source

Vibrational Circular Dichroism Spectra of 2,5‐Diaminoterephtalate Macrocycles Reveal Distant Vibrational Exciton Coupling

Chemistry – A European Journal, EarlyView.
The energy level diagrams for the ν(C═O) and the δ(N─H) vibrations, resulting of combining in‐phase and out‐of‐phase modes on the basis of their local symmetries, was built by applying the exciton coupling theory to a new class of chiral macrocycles, based on the 2,5‐diaminoterephthalate scaffold.
Samara Medina, Krzysztof Nowak, Marek Grzybowski, Juan Casado, Francisco J. Ramírez   +4 more
wiley   +1 more source

Reversible Assembly and Disassembly of σ‐Aromatic B3 Rings

Chemistry – A European Journal, EarlyView.
B3 rings are the smallest σ‐aromatic boron compounds. Here, we show for the first time that cationic diboranes with an electron‐precise (2c,2e) bond can be reversibly converted to σ‐aromatic B3 rings with electron‐deficient (3c,2e) bonding. Base‐induced disassembly of the B3 ring leads back to cationic diboranes and monoborane adducts.
Julian Krauß, Frederick Koch, Niels Karsten Paul Hecht, Elisabeth Kaifer, Hans‐Jörg Himmel   +4 more
wiley   +1 more source

Illuminating Olympicenes: Insights Into Anti‐Kasha Photophysics in Polycyclic Aromatic Hydrocarbons

Chemistry – A European Journal, EarlyView.
Compact olympicene‐based chromophores reveal unexpectedly rich excited‐state behavior, including dual fluorescence, excitation‐dependent emission, and anti‐Kasha‐type emission. Tunable locally excited and intramolecular charge‐transfer states emerge from subtle structural changes, expanding the design rules for polycyclic aromatic chromophores and ...
Wenlong Li, Stephen Awuku, Mia E. Dionne, Jordyn L. Gunderson, Marc R. MacKinnon, Amy L. Stevens   +5 more
wiley   +1 more source

Study of frequency tunability of a multiple passband Microwave Photonic Filter and its application to optoelectronic oscillators [PDF]

The area of Microwave Photonics (MWP) is considered on one aspect as the manner of using optoelectronic devices and systems to manipulate microwave systems and on the other aspect as the study of optoelectronic devices and systems that generate and ...
Blaise Tshibangu Mbuebue
core  

Fluorene‐based blue emitters: On the path to electrically pumped organic lasers

FlexMat, EarlyView.
Electrically pumped efficient operation remains unrealized, a major challenge in optoelectronics. Fluorene‐based blue‐emitting semiconductors are promising gain media, thanks to their structural tunability and favorable emission properties. This review summarizes recent advances, highlights their reliability and versatility in lasing, and outlines key ...
Yong Yan, Hao Li, Mengna Yu, Huiyin Wang, Jiangqiang He, Menghan Wu, Quanyou Feng, Linghai Xie   +7 more
wiley   +1 more source

Graphene oxide/exfoliated black phosphorus van der Waals heterojunctions for PEDOT:PSS‐free‐based organic light‐emitting diodes achieving excellent electroluminescence performance

FlexMat, EarlyView.
A novel two‐dimensional heterojunction assembled from graphene oxide and exfoliated black phosphorus via van der Waals interactions is proposed to replace widely used poly(3,4‐ethylenedioxythiophene)‐polystyrene sulfonate for efficient hole injection layer in organic light‐emitting diodes, achieving impressive electroluminescence performance.
Yuefeng Li, Xiaozhen Wei, Ruihao Yang, Shuyu Li, Jingkun Wang, Min Zhao, Yanqin Miao, Yuying Hao, Hua Wang, Kunping Guo   +9 more
wiley   +1 more source

Lead‐free halide perovskites for efficient light‐emitting devices

FlexMat, EarlyView.
Overview of Lead‐free metal halide perovskites with different categories and optoelectronic application directions, including solid‐state lighting, light‐emitting diodes, piezoluminescence, flexible electronics, scintillators and CPL emitters. Abstract Lead halide perovskites exhibit promising optoelectronic properties for optoelectronic applications ...
Yueqi Shen, Kefan Meng, Yiqi Zhao, Chaoran Zhou, Jiaye Shu, Di Zhang, Chengqian Cao, Wanxin Chen, Yefeng Zhou, Weihua Ning   +9 more
wiley   +1 more source