Results 131 to 140 of about 22,469 (293)
Journal of the Science of Food and Agriculture, EarlyView.Abstract Mycotoxins remain a persistent threat to the safety and quality of cereal grains and other agricultural products, and their impact on human health continues to raise global concerns. In many situations, the practices traditionally used to control these toxins are no longer sufficiently effective. They can be costly, difficult to implement on a
Abolfazl Asqardokht‐Aliabadi +2 more
wiley +1 more source
Upconversion luminescence of CdTe nanoparticles
, 2005 Efficient upconversion luminescence is observed from CdTe nanoparticles in solution and precipitated as solids. In the solids, the upconversion luminescence spectrum is significantly red shifted relative to the photoluminescence spectrum, whereas in ...
Joly, A G +4 more
core +1 more source
Laser &Photonics Reviews, EarlyView.An etchless lithium niobate (LN) metasurface with a slanted periodic TiO2 grating enables efficient and narrowband second‐harmonic generation (SHG) thanks to the light confinement in the LN film granted by quasi‐bound‐state‐in‐the‐continuum (q‐BIC) modes.
Yaping Hou +10 more
wiley +1 more source
Optically Switchable Organic Field Effect Transistor via Intensity Modulated Single Near‐IR Source
Advanced Electronic MaterialsOptically switchable organic field effect transistors (OFETs) offer an additional modality for conventional electronic devices, allowing their electrical output to be switched via a specific optical input. Previously, optically switchable OFETs employing
Sungil Sunwoo +6 more
doaj +1 more source
ÓXIDO DE ÍTRIO E ALUMÍNIO DOPADO COM Yb3+ E Er3+ INCORPORADO EM MEMBRANA DE POLIAMIDA
Química NovaLanthanide ions have special light emission, which can occur through descending and ascending energy conversion. Ascending energy conversion is especially interesting for bioapplications because excitation in the infrared region does not excite ...
Michel L. de Souza +8 more
doaj +1 more source
Laser &Photonics Reviews, EarlyView.A dual‐gated nanophotonic platform integrates lanthanide‐doped upconversion nanoparticles with a stimuli‐responsive silk–zirconia photonic crystal to enable multilevel optical encryption. Resonant photonic coupling allows hydration‐dependent modulation of visible emission under near‐infrared excitation, achieving reversible switching between decoy and ...
Taehoon Kim +3 more
wiley +1 more source
Infrared upconversion for astronomy [PDF]
, 1977 The basic theory of upconversion is presented, along with a brief historical summary of upconversion techniques. Upconverters were used in astronomical studies, but have met with only modest success. Upconversion will become a useful detection method for
Boyd, R. W.
core
Laser &Photonics Reviews, EarlyView.Optical neuromodulation with IR light allows stimulation of the PNS without the need for physical contact with the target nerve or without requiring any genetic modification. The clinical translation of this technique will pave the way to the development of neural interfaces for restoring sensory feedback in individuals with limb amputation.
Federica Piccirillo +20 more
wiley +1 more source
Multispectral Mid‐Infrared Imaging With Incoherent Light via Adiabatic Upconversion
Laser &Photonics Reviews, EarlyView.We demonstrate room‐temperature broadband MIR imaging based on adiabatic frequency upconversion, driven by a Q‐switched pump laser and incoherent illumination. The small‐foot‐print system upconverts the spectral range to the visible domain, without scanning, thermal control and with spatial resolution below 20μm$20\mathrm{\mu}\mathrm{m}$.
Daniel Beitner +4 more
wiley +1 more source
, 2017 Upconversion nanoparticles (UCNPs) are a novel class of luminescent tags for applications in life and material sciences. Unlike traditional fluorophores, UCNPs exhibit emission of shorter wavelength under near-infrared excitation (typically 980 nm).
Hlaváček, Antonín +4 more
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