Results 21 to 30 of about 139,726 (281)

Monolithic integration of multicolor InGaN LEDs with uniform luminescence emission

open access: yesOptics Express, 2021
We report the demonstration of monolithic integration of multicolor LEDs with highly spatially uniform emission wavelength. LEDs with colors ranging from green to orange are realized in a single selective area epitaxy process, and pronounced emission peak with very narrow spectral linewidth from photonic crystal effect is also achieved simultaneously ...
Xianhe Liu   +4 more
openaire   +2 more sources

Polarized Curvature Radiation in Pulsar Magnetosphere [PDF]

open access: yes, 2014
The propagation of polarized emission in pulsar magnetosphere is investigated in this paper. The polarized waves are generated through curvature radiation from the relativistic particles streaming along curved magnetic field lines and co-rotating with ...
Han, J. L., Wang, C., Wang, P. F.
core   +1 more source

A CMOS 8×8 SPAD array for Time-of-Flight measurement and light-spot statistics [PDF]

open access: yes, 2013
The design and simulation of a CMOS 8 × 8 single photon avalanche diode (SPAD) array is presented. The chip has been fabricated in a 0.18μm standard CMOS technology and implements a double functionality: measuring the Time-of-Flight with the help of a ...
Carmona Galán, Ricardo   +2 more
core   +1 more source

Non-Uniformity Induced Artifacts in Single-Photon Emission Computed Tomography [PDF]

open access: yesActa Radiologica: Oncology, 1983
Changes of gamma camera uniformity due to choice of flood source configuration and camera head orientation, and influence of these changes on the reconstructed image, have been analysed using phantom measurements. The transfer of defects in the projection data to the reconstructed image has also been investigated using computer simulations. The results
B, Axelsson, A, Israelsson, S, Larsson
openaire   +2 more sources

Double-Layer Silicon PIN Photodiode X-Ray Detector for a Future X-ray Timing Mission [PDF]

open access: yes, 2006
A double-layer silicon detector consisting of two 500micron-thick silicon PIN photodiodes with independent readouts was mounted in a vacuum chamber and tested with X-ray sources.
Bradt   +4 more
core   +3 more sources

Si/SiGe bound-to-continuum quantum cascade emitters [PDF]

open access: yes, 2008
Si/SiGe bound-to-continuum quantum cascade emitters designed by self-consistent 6-band k.p modeling and grown by low energy plasma enhanced chemical vapour deposition are presented demonstrating electroluminescence between 1.5 and 3 THz.
Chrastina, D.   +9 more
core   +1 more source

Study on explosive emission characteristics of the silicon carbide modified graphite cathodes with varied morphologies

open access: yesAIP Advances, 2023
Explosive emission cathodes are extensively used in high power microwave sources. Growing requirements are highlighted in the performance of the explosive emission cathode with the development of the high power microwave technology.
Ye Hua   +6 more
doaj   +1 more source

Electron Emission Properties of Silicon-Rich Silicon Oxide Film Prepared by Reactive Magnetron Sputtering Deposition and Rapid Thermal Annealing [PDF]

open access: yesMaterials Research, 2020
Silicon-rich silicon oxide (SRSO) film was prepared through the deposition of SiOx film by radio-frequency reactive magnetron sputtering from a Si target and the subsequent rapid thermal annealing treatment of SiOx film, and planar-type field emission ...
Yan Pang   +7 more
doaj   +1 more source

Phase Space Engineering in Optical Microcavities I: Preserving near-field uniformity while inducing far-field directionality [PDF]

open access: yes, 2010
Optical microcavities have received much attention over the last decade from different research fields ranging from fundamental issues of cavity QED to specific applications such as microlasers and bio-sensors. A major issue in the latter applications is
Dubé, Louis J.   +3 more
core   +2 more sources

Pairs emission in a uniform background field: an algebraic approach [PDF]

open access: yesJournal of Physics A: Mathematical and Theoretical, 2011
26 pages, no ...
openaire   +2 more sources

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