We examine resonant interactions of optical pulses with nanostructured materials in the case of the electric field interacting with plasmonic oscillations in metallic nanospheres and double resonance including the mag...
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Enhancement of light extraction in GaN light-emitting diodes (LEDs) employing omnidirectional reflectors (ODRs) is presented. The ODR consists of GaN, ITO nanorod low-refractive-index layer, and an Ag layer. An array ...
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Enhancement of light extraction in GaN light-emitting diodes (LEDs) employing omnidirectional reflectors (ODRs) is presented. The ODR consists of GaN, ITO nanorod low-refractive-index layer, and an Ag layer. An array of ITO nanorods is deposited by oblique-angle deposition using e-beam evaporation. The refractive index of the ITO nanorods is 1.34 at 461 nm, significantly lower that that of dense ITO, which is n = 2.06 at 461 nm. It is experimentally shown that the GaN LED with GaN/ITO nanorods/Ag ODR show much better electrical properties and higher light-extraction efficiency than LEDs with Ag contact. This is attributed to enhanced reflectivity of the ODR by using an ITO low-refractive-index layer with high transparency, high conductivity, and low refractive index.
We measured the magnetic properties and heat capacity of three DyAl2 single crystals with the magnetic field oriented along the three principal crystallographic directions: [100], [110], and [111]. The isothermal entr...
We measured the magnetic properties and heat capacity of three DyAl2 single crystals with the magnetic field oriented along the three principal crystallographic directions: [100], [110], and [111]. The isothermal entropy change versus temperature curves were obtained from heat capacity and magnetization data for these directions. The experimental results were successfully explained by a mean field model that includes spin reorientation, exchange interactions, and crystalline electric field effects. The anomalous magnetocaloric effect along the [111] direction predicted by theory was confirmed experimentally.
This manuscript presents the development of a low intensity magnetic field transducer, based on the Giant Magnetoimpedance (GMI) effect, to be used for biomedical applications. The GMI effect is a characteristic of so...
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ISBN:
(纸本)9781622766970
This manuscript presents the development of a low intensity magnetic field transducer, based on the Giant Magnetoimpedance (GMI) effect, to be used for biomedical applications. The GMI effect is a characteristic of some ferromagnetic materials, due to which it is observed a large variation of the material impedance due to external dc magnetic fields. We describe the effect, the transducer configuration, the electronic circuits and the preliminary results obtained so far. A sensitivity comparable to a fluxgate probe has already been obtained, and the theoretical calculations indicate the possibility of further enhancing this figure of merit.
Laser cooling in thulium- and ytterbium-doped BaY2F8 crystals is observed. We investigate the potential of this crystalline host for all-solid-state cryocooler applications as compared to those based on rare-earth dop...
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We present design features and applications of a novel UV-visible-NIR FLIM system with optical sectioning, high resolution (50ps), and large temporal dynamic range (750ps-1μs) to probe cellular metabolism and detect ...
We developed a controlled-environment FLIM system towards intracellular oxygen sensing, with a resolution of approximately 8 μM, covering the entire physiologic range (0-300 μM). We measured oxygen levels in normal ...
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Numerical simulations of time-resolved light transport in inhomogeneous tissues reveal quantitative, 3D-distributions of excitation and fluorescent light. Visualizations generated can assist the optimization of endosc...
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