Results 81 to 90 of about 9,378 (232)
A Soft X-ray Polarimeter Designed for Broad-band X-ray Telescopes
, 2007 A novel approach for measuring linear X-ray polarization over a broad-band using conventional imaging optics and cameras is described. A new type of high efficiency grating, called the critical angle transmission grating is used to disperse soft X-rays ...
Marshall, Herman L.
core +1 more source
The Infrared Imaging Spectrograph (IRIS) for TMT: Volume phase holographic grating performance testing and discussion [PDF]
, 2014 Maximizing the grating efficiency is a key goal for the first light instrument IRIS (Infrared Imaging Spectrograph) currently being designed to sample the diffraction limit of the TMT (Thirty Meter Telescope). Volume Phase Holographic (VPH) gratings have
Chen, Shaojie +7 more
core +2 more sources
Modular and Automated Workflow for Streamlined Raman Signal Analysis
Journal of Raman Spectroscopy, EarlyView.This study presents an automated workflow for preprocessing and analyzing Raman spectroscopy data, addressing key challenges such as noise suppression, baseline correction, and peak fitting using Voigt profiles. The method is validated on both synthetic and experimental spectra, demonstrating improved spectral fidelity and peak detection for biomedical
Mykyta Kizilov +3 more
wiley +1 more source
Crystals, 2017 Liquid crystal (LC) is a promising candidate for terahertz (THz) devices. Recently, LC has been introduced to generate THz vortex beams. However, the efficiency is intensely dependent on the incident wavelength, and the transformed THz vortex beam is ...
Shi-Jun Ge +7 more
doaj +1 more source
Fully-automated optimization of grating couplers
, 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.
Piggott, Alexander Y. +5 more
core +1 more source
Identity‐Enabled CDMA LiDAR for Massively Parallel Ranging with a Single‐Element Receiver
Laser &Photonics Reviews, EarlyView.A novel LiDAR system integrates CDMA modulation with a single‐element detector to achieve massive channel parallel 3D imaging. By using a user identification code and a correlation‐based feedback loop, it overcomes signal collisions and the near‐far problem.
Yixiu Shen, Zi Heng Lim, Guangya Zhou
wiley +1 more source
Angle-multiplexed metasurfaces: encoding independent wavefronts in a single metasurface under different illumination angles [PDF]
, 2017 The angular response of thin diffractive optical elements is highly correlated. For example, the angles of incidence and diffraction of a grating are locked through the grating momentum determined by the grating period.
Arbabi, Amir +5 more
core +4 more sources
Compact Spectral Imaging: A Review of Miniaturized and Integrated Systems
Laser &Photonics Reviews, EarlyView.This review explores the rapid shift toward compact spectral imaging systems by examining four key design paradigms: Do‐It‐Yourself (DIY) platforms, freeform optics, filter‐on‐chip integration, and multifunctional metasurfaces. The discussion highlights critical applications in medicine, agriculture, and environmental monitoring, providing comparative ...
Sani Mukhtar, Amir Arbabi, Jaime Viegas
wiley +1 more source
Effective free energy method for nematic liquid crystals in contact with structured substrates
, 2007 We study the phase behavior of a nematic liquid crystal confined between a flat substrate with strong anchoring and a patterned substrate whose structure and local anchoring strength we vary.
Harnau, L. +2 more
core +1 more source
Superpositions of the Orbital Angular Momentum for Applications in Quantum Experiments [PDF]
, 2001 Two different experimental techniques for preparation and analyzing superpositions of the Gaussian and Laguerre-Gassian modes are presented. This is done exploiting an interferometric method on the one hand and using computer generated holograms on the ...
Alipasha Vaziri +6 more
core +3 more sources