Ion-beam-induced upconversion

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Web22 aug. 2024 · First, the bottom electrode is patterned by using a standard optical lithography process, and then vertical Ar + ion milling is done to prepare the bottom electrode using an IBE system with 300 eV electron beam energy, 80 mA ion beam current, and 100 mA neutralization current under a 5.0×10-4 Pa background vacuum and a … WebThe model, based on propagation-rate equations of a laser system containing isolated ions and ion-pairs, is numerically solved by combining Runge-Kutta and full-vectorial finite …

Upconversion Nanoparticles: Stability, Surface Modification and …

Web30 okt. 2014 · To investigate ion beam effects on polyimide, pyromellitic dianhydride--oxydianiline films were exposed to He/sup 2 +/ ions in the energy range of 1.9 to 3.6 MeV, fluences of 0.25 to 3.0 x 10/sup 15/ ions/cm/sup 2/, and sample temperatures of 298 and 130 K. RBS, x-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, … WebWe experimentally observed that the ion beam can be used as a new form of excitation source to induce photon upconversion in lanthanide-doped nanocrystals. This approach enables luminescence imaging and simultaneous mapping of cellular structures with a spatial resolution of sub-30 nm. onscene tv news channel

Introductory Chapter: Ion Beam Applications IntechOpen

WebAbstract. This paper reports a systematic analysis on the upconversion fluorescence from a Nd 3+-doped LaF 3 planar waveguide grown on (111) oriented CaF 2 substrates by molecular beam epitaxy. A spectroscopic study of upconversion emission has been carried out at low temperature. Web15 aug. 2011 · The dynamic response after pump switch-on of a 980 nm pumped-ring laser based on an active photonic crystal fiber with an Er3+ ion concentration of ≈1020 ions cm−3 was registered. Then a numerical… Expand Dynamic Characterization of Upconversion in Highly Er-Doped Silica Photonic Crystal Fibers Web9 feb. 2024 · We developed transcranial NIR optogenetic stimulation of specifically labeled neurons in deep brain areas, where tissue-penetrating NIR light is locally converted to visible light at levels sufficient for activating channelrhodopsin-expressing neurons ().This requires lanthanide-doped upconversion nanoparticles (UCNPs) capable of converting low … in your house 2 the lumberjacks

Mechanically induced enhancement and modulation of …

Nanoscale optical writing through upconversion resonance …

Web27 okt. 2015 · Photovoltaic cells are able to convert sunlight into electricity, providing enough of the most abundant and cleanest energy to cover our energy needs. However, the efficiency of current photovoltaics is … Web14 jun. 2024 · 1. Introduction. This chapter elucidates the concept of low-energy/high-energy ion implantation and its key applications in materials science. Ion implantation is the interaction of energetic ion beam with solids. In this ion-solid interaction, ions penetrate through the materials and slow down to some extent into the materials due to ... in your house countdown dailymotionWeb12 nov. 2015 · We experimentally observed that the ion beam can be used as a new form of excitation source to induce photon upconversion in lanthanide-doped nanocrystals. ons census categories

"Webpiezoelectric-induced ML emissions.35−40 On the other hand, the Er3+ ion is one of the most studied rare earth luminescence centers with UC ability.41,42 Temperature sensing based on the ﬂuorescence intensity ratio (FIR) between 2H 11/2 and 4S 3/2 → 4I 15/2 transitions of Er 3+ has been demonstrated with the " - Ion-beam-induced upconversion

Ion-beam-induced upconversion

Mutation breeding of ornamental plants using ion beams - 日本 …

Web7 apr. 2024 · In this work, near-infrared light responsive upconversion nanoparticles TiO 2 /(Ca,Y)F 2:Tm,Yb were hydrothermally prepared for tumor control.Moreover, femtosecond laser was adopted to reduce particle size and aggregation of TiO 2 /(Ca,Y)F 2:Tm,Yb, as a strategy to enhance its dispersity. In vitro studies of the biocompatibility and tumor … Webion-beam-induced upconversion emission of Tm3þ at short wavelengths through energy transfer upconversion. To shed more light on the energy transfer between …

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WebBending strain induces strong enhancement and modulation of the upconversion emission in doped BTO thin films. Because the unshielded 3d 5 configuration of Mn 2+ is more susceptible to crystal field changes, the introduction of an Mn 2+ ion further promotes the strain-induced modulation effect. WebThese accelerators usually have versatile ion sources which can generate ion beams from essentially the whole Periodic Table. So heavy ion beams are easy to produce, and are …

WebThe development of advanced luminescent materials is highly desirable for addressing the rising threat of forgery. However, it is challenging to achieve stable full-color upconversion (UC) tuning in the same matrix upon a single-beam light excitation so as to ensure that authentic items are irreproducible. Web7 dec. 2016 · A research team led by Prof Andrew BETTIOL from the Centre for Ion Beam Applications (CIBA) in the Department of Physics, NUS has constructed a system for …

WebSemiconductor Physics [2 ed.] 9783031182853, 9783031182860 ... ... Web12 nov. 2015 · We experimentally observed that the ion beam can be used as a new form of excitation source to induce photon upconversion in lanthanide-doped nanocrystals. This …

WebPhoton upconversion (UC) is a process in which the sequential absorption of two or more photons leads to the emission of light at shorter wavelength than the excitation wavelength. It is an anti-Stokes type emission. An example is the conversion of infrared light to visible light.Upconversion can take place in both organic and inorganic materials, through a …

WebTime-resolved Z-scan measurements were employed to characterize energy transfer upconversion on the phosphate glass matrix, named PAN (P 2 O 5 –Al 2 O 3 –Na 2 CO 3), doped with increasing Nd 3+ concentrations. It was observed a linear dependence of the upconversion parameter with the dopant agent, which indicates the presence of a static … in your house 3 1995Web13 apr. 2024 · where \(n\) is the intensity-dependent refractive index \(n = n_{0} + n_{2} I\) in the medium that laser beam propagates and \(\lambda\) is the wavelength. The voltage influence in the refractive index can be compared with similar experiments in a graphical method [] where similar low voltage values were used.The measurement of the z-scan … onscene youtubeWeb1 aug. 2024 · In this work, we firstly report that one-photon absorption-based upconversion (oPUC) exhibits aggregation-induced emission enhancement (AIEE) based on … in your house 5 reviewWeb13 mrt. 2024 · We propose the use of an n-doped periodic AlN/GaN quantum cascade structure for the optical up-conversion of multiple near-infrared (near-IR) photons into deep-ultraviolet (deep-UV) radiation. Without applying an external bias voltage, the active region of such a device will (similar to an un-biased quantum cascade laser) resemble a … in your house 6 reviewWeb5 aug. 2024 · However, for ion beam-sensitive materials such as halide perovskites, the ion beam milling process can easily cause decomposition and structure damage to the specimen. Here we investigate the influence factors of ion beam damage theoretically and experimentally, and successfully obtain the high-resolution transmission electron … in your house 7 1996http://13900138.s21d-13.faiusrd.com/61/ABUIABA9GAAglfO5yQUot8LBxgU.pdf ons census 2021 walesWebUltraviolet upconversion emissions of 246.2 and 252.8 nm from 6DJ levels of Gd3+ ions were observed in GdF3: 10% Yb3+, 0.7% Tm3+ nanocrystals under 980 nm excitation from a laser diode. The 6DJ levels of Gd3+ ions can be efficiently populated by energy transfer processes of Yb-->Tm-->Gd and Yb-->Gd. A six-photon upconversion process was … in your house 6 1996