Results 71 to 80 of about 45,495 (276)

Broadband integrated beam splitter using spatial adiabatic passage

, 2018
Light routing and manipulation are important aspects of integrated optics. They essentially rely on beam splitters which are at the heart of interferometric setups and active routing.
Alibart, Olivier, Apetrei, Alin M., Belabas, Nadia, Bellec, Matthieu, De Micheli, Marc P., Doutre, Florent, Lunghi, Tommaso, Rambu, Alicia Petonela, Tanzilli, Sébastien, Tascu, Sorin   +9 more
core   +3 more sources

Profiling Co‐Occurrent Morphological Phenotypes and Their Degree of Expression Severity in Vacuolated Cells by Holo‐Tomographic Flow Cytometry and Fractal Analysis

Advanced Intelligent Systems, EarlyView.
HTFC gets 3D refractive index tomograms of flowing cells. Label‐free monocytes are engineered to express patterns of cytoplasmic vacuoles. From the tomogram, an efficient dimensionality reduction is operated. Interpretable features are extracted to classify the expression severity of phenotypes coexisting in each cell, visually represented by a seven ...
Marika Valentino, Giusy Giugliano, Daniele Pirone, Fabrizio Licitra, Fulvia Vitale, Pasquale Memmolo, Lisa Miccio, Massimo D’Agostino, Pietro Ferraro, Vittorio Bianco   +9 more
wiley   +1 more source

Hybrid achromatic microlenses with high numerical apertures and focusing efficiencies across the visible

Nature Communications, 2023
Compact visible wavelength achromats are essential for miniaturized and lightweight optics. However, fabrication of such achromats has proved to be exceptionally challenging. Here, using subsurface 3D printing inside mesoporous hosts we densely integrate
Corey A. Richards, Christian R. Ocier, Dajie Xie, Haibo Gao, Taylor Robertson, Lynford L. Goddard, Rasmus E. Christiansen, David G. Cahill, Paul V. Braun   +8 more
doaj   +1 more source

Achromatizing a liquid-crystal spectropolarimeter: Retardance vs Stokes-based calibration of HiVIS

, 2010
Astronomical spectropolarimeters can be subject to many sources of systematic error which limit the precision and accuracy of the instrument. We present a calibration method for observing high-resolution polarized spectra using chromatic liquid-crystal ...
C. Sennhauser, Collett E., D. M. Harrington, E. J. Messersmith, J. R. Kuhn, Joos F., Nagaraju K., Pomozi I., R. J. Thornton, Semel M., Snik F., Stenflo J. O., Stenflo J. O., Tinbergen J.   +13 more
core   +1 more source

Repeating Nuclear Transients From Repeating Partial Tidal Disruption Events

Astronomische Nachrichten, EarlyView.
ABSTRACT Extragalactic nuclear transients that exhibit repeating outbursts can be modeled as the repeated dynamical interaction between bound stars and supermassive black holes (SMBHs). A subset of these transients, with recurrence timescales of months‐to‐years, have been explained as accretion flares from the repeated tidal stripping of a star by an ...
Ananya Bandopadhyay, Eric R. Coughlin, Julia Fancher, C. J. Nixon, Dheeraj R. Pasham   +4 more
wiley   +1 more source

High-efficiency broadband achromatic orbital-angular-momentum metalens for focusing and edge-enhanced imaging in mid-wavelength infrared

Results in Physics
Edge-enhanced detection based on spiral phase contrast imaging driven by orbital angular momentum (OAM) of light, offers a promising way to obtain low-light-level signals.
Yijie Luo, Kai Ou, Zining Wang, Kaifan Li, Siyu Dong, Jingyuan Zhu, Peng Wang, Yuchao Wang, Xiong Dun, Zeyong Wei   +9 more
doaj   +1 more source

An achromatic metafiber for focusing and imaging across the entire telecommunication range

Nature Communications, 2022
The authors fabricate a 3D achromatic diffractive metalens on the end face of a single-mode fiber, useful for endoscopic applications. They demonstrate achromatic and polarization insensitive focusing across the entire near-infrared telecommunication ...
Haoran Ren, Jaehyuck Jang, Chenhao Li, Andreas Aigner, Malte Plidschun, Jisoo Kim, Junsuk Rho, Markus A. Schmidt, Stefan A. Maier   +8 more
doaj   +1 more source

On-sky observations with an achromatic hybrid phase knife coronagraph in the visible [PDF]

, 2006
CONTEXT: The four-quadrant phase mask stellar coronagraph, introduced by D. Rouan et al., is capable of achieving very high dynamical range imaging and was studied in the context of the direct detection of extra-solar planets.
A. Domiciano de Souza, Abe, Abe, Aime, Aime, Aristidi, Bloemhof, F. Vakili, Fini, Gay, Guyon, J. Gay, J.-P. Rivet, Kuchner, L. Abe, M. Beaulieu, Marois, Marois, Mayor, Racine, Roddier, Rouan, S. Dervaux, Soummer, Vanderbei   +24 more
core   +5 more sources

Bio‐inspired nanophotonics: Structural color, chirality, and resonance metasurfaces

InfoMat, EarlyView.
A butterfly‐wing‐inspired anisotropic plasmonic flatband resonant metasurface. Insets, photo of the butterfly, Sasakia charonda, and the SEM image of its wing scale (above); the SEM image of the metasurface (below). Abstract The dazzling colors of butterfly wings and hummingbird feathers are not painted with pigments, but crafted by nature's invisible ...
Weihan Liu, Yao Liang, Din Ping Tsai
wiley   +1 more source

Gamma-ray Burst Afterglow with Continuous Energy Injection: Signature of a Highly-Magnetized Millisecond Pulsar

, 2001
We investigate the consequences of a continuously injecting central engine on the gamma-ray burst afterglow emission, focusing more specifically on a highly-magnetized millisecond pulsar engine.
Bing Zhang, Dai Z. G., Masetti N., Peter Mészáros, Spruit H. C., Thompson C.   +5 more
core   +1 more source