Results 141 to 150 of about 137,995 (220)

Origin of the Temperature-Induced Gap Bowing of Formamidinium-Methylammonium Lead Iodide Perovskites: Role of Cationic Rattlers. [PDF]

J Phys Chem Lett
Xu K, Francisco-López A, Charles BL, Alonso MI, Garriga M, Weller MT, Goñi AR.   +6 more
europepmc   +1 more source

Visible Octave Frequency Combs in Silicon Nitride Nanophotonic Waveguides Driven by Ti:Sapphire Lasers

Laser &Photonics Reviews, EarlyView.
Chip‐based frequency combs are usually pumped from telecom wavelengths, far from the visible. This work instead pumps close to the visible with a Ti:sapphire laser ‐ the source behind the original optical frequency combs and now becoming chip‐integrable‐ and lets silicon‐nitride waveguides convert it into efficient, octave‐spanning visible‐to‐infrared ...
Abdullah Alabbadi, Ewan Allan, Hanna Ostapenko, Pablo Castro‐Marín, Derryck T. Reid, Pascal Del'Haye   +5 more
wiley   +1 more source

Hopf-Hopf bifurcation analysis and chaotic delayed-DNA audio encryption using cubic nonlinear optoelectronic oscillator. [PDF]

Sci Rep
Aiyaz M, Yan J, Abbasi AZ, Abdullah N, Becheikh N, Hassen W, Ghachem K.   +6 more
europepmc   +1 more source

Tunable, High Pulse Energy and Narrow Linewidth Gas‐Filled Fiber Laser Across Near‐ and Mid‐Infrared

Laser &Photonics Reviews, EarlyView.
A cascaded gas‐filled anti‐resonant hollow‐core fiber architecture enables broadly tunable infrared Raman lasers spanning ∼1.4–4.6 µm while maintaining microjoule‐level pulse energies and gigahertz‐level linewidths. The approach combines a wavelength‐tunable pump laser with optimized Raman frequency conversion, providing a compact route to high ...
Yazhou Wang, Marcello Meneghetti, Manoj K. Dasa, Timothy Bate, J. E. Antonio‐Lopez, Ian A. Davidson, Qiang Fu, Jaroslaw Rzegocki, Gregory T. Jasion, Francesco Poletti, Rodrigo Amezcua‐Correa, Christos Markos   +11 more
wiley   +1 more source

Optically reconfigurable physical unclonable functions based on 2D MoS₂ ring-oscillator arrays for attack-resistant hardware authentication. [PDF]

Nat Commun
Li T, Zhou Y, Zhang X, Guan Q, Cheng H, Huang L, Du H, Wang Y, Li Y, Yu H, Li N, Yang R, Zhang G.   +12 more
europepmc   +1 more source

Room‐Temperature Polariton Condensation Into Superscar Modes in Growth‐Defined Triangular Micro‐Prism Resonators

Laser &Photonics Reviews, EarlyView.
High‐Q superscar modes in growth‐defined triangular GaN micro‐prism resonators enable strong exciton–photon coupling and room‐temperature polariton condensation, offering a scalable platform for integrated III‐nitride polariton devices. ABSTRACT Group III‐nitride semiconductors are regarded as key materials for realizing polariton devices operating at ...
Chan‐Young Sung, Jungwon Kim, Daegwang Choi, Hyun Gyu Song, Yong‐Hoon Cho   +4 more
wiley   +1 more source

A Dual-Mode Memristor-Based Oscillator for Energy-Efficient Biomedical Wireless Systems. [PDF]

Micromachines (Basel)
Barraj I, Masmoudi M.
europepmc   +1 more source

Machine learning‐driven advances in carbon‐based quantum dots: Opportunities accompanied by challenges

Responsive Materials, EarlyView.
Machine learning provides a unifying framework to connect structure, fluorescence properties, and applications of carbon‐based quantum dots. This review highlights how data‐driven strategies enable fluorescence regulation, reveal underlying mechanisms, and accelerate the rational design of functional carbon dots.
Liangfeng Chen, Siwei Yang, Xiangqian Cui, Ziheng Liu, Hang Wang, Yongqiang Li, Peng He, Miao Wang, Guqiao Ding   +8 more
wiley   +1 more source

Correlated Vibrational and Electronic Signatures of Surface Disorder in CsPbBr₃ Nanocrystals. [PDF]

ACS Nano
Haward TB, Lim VJ, Cherniukh I, Bodnarchuk MI, Kovalenko MV, Herz LM.   +5 more
europepmc   +1 more source

Mg2+ Ions as Interfacial Charge Bridges for Enhanced Photocatalytic Hydrogen Evolution in Poly(Heptazine Imide)

Small, EarlyView.
Mg2+ confined within poly(heptazine imide) acts as a heterogenized interfacial charge bridge capable to couple synergistically the semiconductor with Pt co‐catalysts, thus enhancing hydrogen evolution. Through water polarization and hydroxide stabilization, a dynamic Mg2+‐OHδ−‐Hδ+‐Pt motif facilitates proton transfer and overcomes interfacial electron ...
Gabriel A. A. Diab, Vitor G. S. Pastana, Sara Stolfi, Rayse M. Ferreira, Izadora F. Reis, Marcos A. R. da Silva, Caio V. C. Ribeiro, Kathrin Küster, Piero Torelli, Paolo Ghigna, Viola Duppel, Maurizio Fagnoni, Sebastian Bette, Bruna R. Serino, Andre F. de Moura, Davide Ravelli, Bettina V. Lotsch, Ivo F. Teixeira   +17 more
wiley   +1 more source