Results 51 to 60 of about 1,364,580 (250)

Sub‐1 ms Optoelectronic Synapse Based on {ZnCdO/ZnO} Multilayer Structure for High‐Speed Neuromorphic Vision Systems

Advanced Functional Materials, EarlyView.
Eu‐doped {ZnCdO/ZnO} structures grown on Si are developed, showcasing dual‐functionality controlled by europium doping. While high europium concentration transforms the device into an ultrafast, self‐powered photodetector, low‐doped structures can be used as an optoelectronic synapse.
Igor Perlikowski, Eunika Zielony, Adrian Kaim, Ewa Przeździecka   +3 more
wiley   +1 more source

Ultrafast dynamics in InAs quantum dot and GaInNAs quantum well semiconductor heterostructures [PDF]

, 2007
The quantum confined Stark effect (QCSE) and ultrafast absorption dynamics near the bandedge have been investigated in p-i-n waveguides comprising quantum confined heterostructures grown on GaAs substrates, for emission at 1.3um.
Malins, David B
core   +2 more sources

Power Scaling of a Narrowband-Seeded, Non-Resonant Optical Parametric Oscillator Based on Periodically Poled LiNbO₃

Photonics
A periodically poled LiNbO3 (PPLN) non-resonant optical parametric oscillator injectionseeded by narrowband sub-50-mW CW radiation at the signal wavelength produces a >3 W average idler power at 2376 nm for a 20 kHz repetition rate, with a ~2 nm spectral
Tugba Temel, Subhasis Das, Gerhard Spindler, André Schirrmacher, Robert T. Murray, Marcin Piotrowski, Li Wang, Weidong Chen, Valentin Petrov   +8 more
doaj   +1 more source

Widely tunable cavity-enhanced ultrafast spectroscopy [PDF]

EPJ Web of Conferences, 2019
Generation of widely tunable frequency combs in the UV, visible, and infrared is discussed for use in cavity-enhanced transient absorption spectroscopy on gas-phase clusters. Progress towards cavity-enhanced two-dimensional spectroscopy is also presented.
Silfies Myles C., Chen Yuning, Timmers Henry, Kowligy Abijith S., Lind Alex, Diddams Scott A., Allison Thomas K.   +6 more
doaj   +1 more source

Steady-State and Ultrafast Fluorescence Depolarisation in Rigid-Rod Conjugated Polymers [PDF]

, 2010
Polarised spectroscopic techniques were used to investigate the underlying physics of steady-state and ultrafast fluorescence depolarisation in conjugated polymers.
Vaughan, Helen Louise, VAUGHAN, HELEN,LOUISE   +1 more
core  

Hopping‐Mediated Zero‐Bias Photocharge Retention in Solution‐Processed Van Der Waals Heterostructures

Advanced Functional Materials, EarlyView.
Liquid–liquid interface assembly enables the fabrication of solution‐processed MoS2 and WSe2 centimeter‐scale, nanometer‐thick type‐II heterostructures on paper. Interfacial charge separation and hopping‐limited recombination produce rectification and persistent photocharge retention at zero bias.
Aniello Pelella, Andrea Sessa, Yi‐Chen Tsai, Xuzhao Liu, Abdul Mannan, George Greaves, Yahya Saboon, Ben Spencer, Antonio Di Bartolomeo, Cinzia Casiraghi, Jessica Boland, Alessandro Grillo   +11 more
wiley   +1 more source

Local photo-mechanical stiffness revealed in gold nanoparticles supracrystals by ultrafast small-angle electron diffraction

Structural Dynamics, 2019
We demonstrate that highly ordered two-dimensional crystals of ligand-capped gold nanoparticles display a local photo-mechanical stiffness as high as that of solids such as graphite.
Giulia Fulvia Mancini, Francesco Pennacchio, Tatiana Latychevskaia, Javier Reguera, Francesco Stellacci, Fabrizio Carbone   +5 more
doaj   +1 more source

Ultrafast Laser-Based Spectroscopy and Sensing: Applications in LIBS, CARS, and THz Spectroscopy

Sensors, 2010
Ultrafast pulsed lasers find application in a range of spectroscopy and sensing techniques including laser induced breakdown spectroscopy (LIBS), coherent Raman spectroscopy, and terahertz (THz) spectroscopy.
Megan R. Leahy-Hoppa, Joseph Miragliotta, Robert Osiander, Jennifer Burnett, Yamac Dikmelik, Caroline McEnnis, James B. Spicer   +6 more
doaj   +1 more source

Ultrafast spectroscopy of linear carbon chains: the case of dinaphthylpolyynes

, 2013
The dynamics of excited states in a special class of linear carbon chains, e.g. dinaphthyl polyynes, has been investigated by ultrafast transient absorption spectroscopy and DFT//TDDFT calculations.
BRIDA, DANIELE, VOZZI, CATERINA, M. Negro, D. Brida, A. Milani, C. Vozzi, E. Cinquanta, NEGRO, MATTEO, L. Ravagnan, D. Fazzi, F. Cataldo, SCOTOGNELLA, FRANCESCO, P. Milani, MILANI, ALBERTO, S. Stagira, STAGIRA, SALVATORE, F. Scotognella   +16 more
core   +1 more source

Nitride MXenes Beyond Carbides: Bridging the Gap Between Computational Prediction and Experimental Realization

Advanced Functional Materials, EarlyView.
Nitride MXenes remain constrained by a persistent gap between computational prediction and experimental realization. This Review identifies the thermodynamic, kinetic, and chemical barriers limiting their synthesis, critically evaluates emerging fabrication routes, and proposes a multidimensional computational‐experimental framework to accelerate the ...
Naresh Varnakavi, Masoud Soroush
wiley   +1 more source