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Coupling into Hyperbolic Carbon-Nanotube Films with a Deep-Etched Antenna Grating
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Magnetically dependent photovoltages in permalloy films and gratings
Significant photoinduced voltages observed in permalloy structures consist of two contributions with different origins, which depend on illumination conditions, structure geometry and magnetic field in distinct ways. The first component is the plasmon drag effect voltage closely associated with plasmon propagation. The second contribution is magnetically dependent and can be related to photoinduced gradients in the sample temperature and spin polarization. Possible mechanisms of the effect are discussed
Plasma Transmission Gratings for Compression of High-Intensity Laser Pulses
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Mitigation of Radiation-Induced Fiber Bragg Grating (FBG) Sensor Drifts in Intense Radiation Environments Based on Long-Short-Term Memory (LSTM) Network
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Post-production correction of lamellar x-ray gratings by ion beam figuring
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Wavefront preserving and high efficiency diamond grating beam splitter for x-ray free electron laser
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Mechanisms of picosecond laser-induced damage in common multilayer dielectric gratings
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Pseudo-gray-scale halftone gratings for shearing and Hartmann wavefront sensors
Now in use on x-ray beamlines worldwide, shearing interferometry and Hartmann wavefront sensing provide effective feedback for measuring and optimizing high-quality beams. Conventionally, both approaches spatially modulate the beam properties (amplitude or phase) using two-tone, binary patterns, leading to deleterious diffraction effects that must be mitigated. In shearing, the presence of multiple diffraction orders affects measurement near boundaries. In Hartmann, diffraction limits the measurement point density. We demonstrate that the use of pseudo-gray-scale halftone patterns in the diffracting elements can improve the performance of both techniques.