Results 51 to 60 of about 16,481 (212)

Nanodiamond‐Based Quantum Sensing Reveals Changes in Endo‐Lysosomal Activity of Stimulated Cardiac Fibroblasts in a Cellular Fibrosis Model

Advanced Functional Materials, EarlyView.
Quantum sensing reveals intricate patterns linking endo‐lysosomal maturation to cardiac fibrosis progression, highlighting complexity in cellular remodeling. This study investigates fibroblast‐to‐myofibroblast transition under cell aging, stiffness, and TGF‐β stimulation, comparing nanodiamond uptake, endo‐lysosomal dynamics, and free radical ...
Aldona Mzyk, Ezgi Yilmaz, Giovanni D Angelo, Kirstine Berg‐Sørensen   +3 more
wiley   +1 more source

The effects of nonlocal impact ionization on the speed of avalanche photodiodes [PDF]

, 2003
The nonlocal enhancement in the velocities of charge carriers to ionization is shown to outweigh the opposing effects of dead space, increasing the avalanche speed of short avalanche photodiodes (APDs) over the predictions of a conventional local model ...
David, J.P.R., Hambleton, P.J., Ng, B.K., Plimmer, S.A., Rees, G.J.   +4 more
core   +1 more source

Spin Defects in Hexagonal Boron Nitride as 2D Strain Sensors

Advanced Functional Materials, EarlyView.
We demonstrate that boron‐vacancy (VB${\rm V}_{\rm B}$) centers in hexagonal boron nitride (hBN) enable quantitative strain sensing with sub‐micrometer resolution. Using this approach under continuously tunable in‐plane stress, we precisely quantify strain‐induced shifts of the E2g${\rm E}_{2{\rm g}}$ Raman mode in multilayer hBN, establishing VB${\rm ...
Zhao Mu, Zhaowei Zhang, Jules Fraunié, Cédric Robert, Grégory Seine, Bernard Gil, Guillaume Cassabois, Vincent Jacques   +7 more
wiley   +1 more source

Geiger-Mode Avalanche Photodiode Arrays Integrated to All-Digital CMOS Circuits

Sensors, 2016
This article reviews MIT Lincoln Laboratory's work over the past 20 years to develop photon-sensitive image sensors based on arrays of silicon Geiger-mode avalanche photodiodes.
Brian Aull
doaj   +1 more source

Ge-on-Si single-photon avalanche diode detectors: design, modeling, fabrication, and characterization at wavelengths 1310 and 1550 nm [PDF]

, 2013
The design, modeling, fabrication, and characterization of single-photon avalanche diode detectors with an epitaxial Ge absorption region grown directly on Si are presented.
Allred, P., Buller, G.S., Gallacher, Kevin, Huante-Ceron, E., Ikonic, Z., Intermite, G., Kelsall, R.W., Knights, A.P., Leadley, D.R., Lever, L.J.M., Myronov, M., Paul, D.J., Pilgrim, N.J., Warburton, R.E.   +13 more
core   +2 more sources

Uncovering the Origin of Efficiency Roll‐Off in TADF OLEDs

Advanced Functional Materials, EarlyView.
OLEDs based on thermally activated delayed fluorescent (TADF) materials often suffer from a severe drop in efficiency at high brightness levels. This work presents a technique to uncover the source of this efficiency drop, and quantifies the exciton‐exciton and exciton‐polaron annihilation processes responsible for efficiency losses in our TADF OLEDs ...
Liam G. King, Kou Yoshida, Arvydas Ruseckas, Ifor D. W. Samuel   +3 more
wiley   +1 more source

InGaAs Communication Photodiodes: From Low- to High-Power-Level Designs

IEEE Photonics Journal, 2010
While InGaAs absorption material has been used for various applications up to 1.6-μm wavelength, specific designs for low-level detection have become of main interest using high responsivity and low-dark-current detectors.
M. Achouche, G. Glastre, C. Caillaud, M. Lahrichi, M. Chtioui, D. Carpentier   +5 more
doaj   +1 more source

Study of the fast calorimeter prototype for the Super Charm-Tau Factory [PDF]

EPJ Web of Conferences, 2019
Modern e+e− factories with high luminosity require fast response time of the detector subsystems to collect the data efficiently and suppress severe beam background.
Prokhorova Ekaterina
doaj   +1 more source

Avalanche noise characteristics of thin GaAs structures with distributed carrier generation [PDF]

, 2000
It is known that both pure electron and pure hole injection into thin GaAs multiplication regions gives rise to avalanche multiplication with noise lower than predicted by the local noise model.
Chang, K.Y., David, J.P.R., Li, K.F., Ong, D.S., Plimmer, S.A., Rees, G.J., Roberts, J.S., Tozer, R.C.   +7 more
core   +1 more source

Clean Up Behind You ‐ Novel Patterning Approach for Solid Immersion Lenses

Advanced Functional Materials, EarlyView.
A focused ion beam (FIB) milling strategy enables rapid fabrication of solid immersion lenses (SILs) with smooth, debris‐free surfaces eliminating the need for post‐processing. The optimized pattern improves efficiency and surface quality. SILs containing NV centers are also investigated, confirming the technique's suitability for quantum and photonic ...
Aleksei Tsarapkin, Stefan Facsko, Wentao Zhang, Anna Mogilatenko, Kilian Unterguggenberger, Bailiang Li, Cem Güney Torun, Gerhard Hobler, Tommaso Pregnolato, Tim Schröder, Katja Höflich   +10 more
wiley   +1 more source