Results 21 to 30 of about 534,558 (401)
Fully-automated optimization of grating couplers. [PDF]
Optics Express, 2017 We present a gradient-based algorithm to design general 1D grating couplers without any human input from start to finish, including a choice of initial condition.
L. Su +5 more
semanticscholar +1 more source
Recent Progress in X-ray and Neutron Phase Imaging with Gratings
Quantum Beam Science, 2020 Under the JST-ERATO project in progress to develop X-ray and neutron phase-imaging methods together, recent achievements have been selected and reviewed after describing the merit and the principle of the phase imaging method.
Atsushi Momose +6 more
doaj +1 more source
A processing method for rough cutting hourglass worm on general NC lathe
Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2019 The manufacturing method of two spatial-orthogonal rotary axis linkage is usually used to cut hourglass worm. However, the traditional processing method of roughing tooth groove depends on the special machine, specific tool, and its processing efficiency
Xinyang QIU +3 more
doaj +1 more source
Measurement of Wafer Focus by Grating Shearing Interferometry
Applied Sciences, 2020 A method applied for improving the measurement precision and efficiency of wafer focusing in an optical lithography instrument (OLI) is introduced. Based on grating shearing interferometry, the defocus and tilt of the wafer are measured by testing the ...
Jian Wang, Song Hu, Xianchang Zhu
doaj +1 more source
1.55 µm AlGaInAs/InP sampled grating laser diodes for mode-locking at THz frequencies [PDF]
, 2018 We report mode locking in lasers integrated with semiconductor optical amplifiers, using either conventional or phase shifted sampled grating distributed Bragg reflectors(DBRs).
Hou, Bin +4 more
core +1 more source
Micromachines, 2019 In this paper, we proposed near-infrared spectroscopy based on a Si photodetector equipped with a gold grating and extended the measurable wavelength range to cover 1200−1600 nm by improving a spectrum derivation procedure.
Yu Suido +4 more
doaj +1 more source
Binary Amplitude Reflection Gratings for X-ray Shearing and Hartmann Wavefront Sensors
Sensors, 2021 New, high-coherent-flux X-ray beamlines at synchrotron and free-electron laser light sources rely on wavefront sensors to achieve and maintain optimal alignment under dynamic operating conditions. This includes feedback to adaptive X-ray optics.
Kenneth A. Goldberg +2 more
doaj +1 more source
EP Europace, 2007 A 72-year-old man presented with advanced symptoms of heart failure due to an idiopathic dilated cardiomyopathy was diagnosed. He presented with sinus rhythm and a left bundle branch block pattern on the electrocardiogram. The echocardiogram showed a severely depressed left ventricular …
Maximo Rivero-Ayerza +3 more
openaire +3 more sources
Biosensors, 2021 Guided-mode resonance (GMR) sensors are widely used as biosensors with the advantages of simple structure, easy detection schemes, high efficiency, and narrow linewidth. However, their applications are limited by their relatively low sensitivity (
Chengrui Zhang +5 more
doaj +1 more source
Lynx grating spectrometer design: Optimizing chirped transmission gratings [PDF]
, 2020 Lynx is one of four large-mission concept studies for NASA's 2020 Decadal survey. The design reference mission includes an X-ray grating spectrometer (XGS) based on critical-angle transmission (CAT) gratings. In the past we studied different grating sizes and arrangements using traditional flat CAT gratings with constant bar spacing.
arxiv +1 more source