Results 161 to 170 of about 7,283 (226)

Epitaxial Integration of III–V Membrane Photodetectors With Lateral p–i–n Junctions on the Silicon‐On‐Insulator Waveguide Platform

Laser &Photonics Reviews, EarlyView.
Epitaxial growth forms III–V membranes directly atop the silicon waveguide layer on SOI, while in‐plane in situ doping defines lateral p–i–n InP/InGaAs junctions in a single growth step. The membrane photodetectors achieve 50 Gb/s NRZ‐OOK operation.
Zhao Yan, Yifu Chen, Martin Ebert, Ka Ming Wong, Wenjie Wang, Tim Grieb, Florian F. Krause, Andreas Rosenauer, Graham T. Reed, David J. Thomson, Qiang Li   +10 more
wiley   +1 more source

Intrinsically Design‐Rule‐Compliant Nanophotonic Inverse Design via Learned Generative Manifolds

Laser &Photonics Reviews, EarlyView.
A generative reparameterization framework for nanophotonic inverse design is introduced, restricting optimization to a learned manifold of design‐rule‐compliant geometries. Unlike conventional penalty‐based approaches, fabrication constraints are encoded intrinsically within the design representation.
Bahrem Serhat Danis, Demet Baldan Desdemir, Enes Akcakoca, Zeynep Ipek Yanmaz, Gulzade Polat, Ahmet Onur Dasdemir, Aytug Aydogan, Abdullah Magden, Emir Salih Magden   +8 more
wiley   +1 more source

Dynamical dark energy in light of the DESI DR2 baryonic acoustic oscillations measurements. [PDF]

Nat Astron
Gu G, Wang X, Wang Y, Zhao GB, Pogosian L, Koyama K, Peacock JA, Cai Z, Cervantes-Cota JL, Ishak M, Shafieloo A, Zhao R, Ahlen S, Bianchi D, Brooks D, Claybaugh T, Cole S, de la Macorra A, de Mattia A, Doel P, Ferraro S, Forero-Romero JE, Gaztañaga E, Gontcho A Gontcho S, Gutierrez G, Hahn C, Howlett C, Kehoe R, Kirkby D, Kneib JP, Kremin A, Lahav O, Landriau M, Le Guillou L, Leauthaud A, Levi M, Manera M, Meisner A, Miquel R, Moustakas J, Muñoz-Gutiérrez A, Nadathur S, Newman JA, Palanque-Delabrouille N, Percival W, Prada F, Pérez-Ràfol I, Rossi G, Samushia L, Sanchez E, Schlegel D, Seo HJ, Sprayberry D, Tarlé G, Walther M, Weaver BA, Zarrouk P, Zhao C, Zhou R, Zou H.   +59 more
europepmc   +1 more source

Tunable Terahertz Generation in Dispersion‐Engineered ZnTe Waveguides

Laser &Photonics Reviews, EarlyView.
A dispersion‐engineered Zinc Telluride (ZnTe) slab waveguide platform enables tunable and efficient guided‐wave terahertz (THz) generation through modal phase matching. By tailoring the optical and THz modal dispersion, coherent THz emission is achieved across 0.1–3 THz.
Arun Jana, Cormac McDonnell, Mai Tal, Anastasiya Reveguk, Amit Kohn, Tal Ellenbogen   +5 more
wiley   +1 more source

Horizontal and vertical exoplanet thermal structure from a JWST spectroscopic eclipse map. [PDF]

Nat Astron
Challener RC, Weiner Mansfield M, Cubillos PE, Piette AAA, Coulombe LP, Beltz H, Blecic J, Rauscher E, Bean JL, Benneke B, Kempton EM, Harrington J, Komacek TD, Parmentier V, Casewell SL, Iro N, Mancini L, Nixon MC, Radica M, Steinrueck ME, Welbanks L, Batalha NM, Caceres C, Crossfield IJM, Crouzet N, Désert JM, Molaverdikhani K, Nikolov NK, Palle E, Rackham BV, Schlawin E, Sing DK, Stevenson KB, Tan X, Turner JD, Zhang X.   +35 more
europepmc   +1 more source

Visible Octave Frequency Combs in Silicon Nitride Nanophotonic Waveguides Driven by Ti:Sapphire Lasers

Laser &Photonics Reviews, EarlyView.
Chip‐based frequency combs are usually pumped from telecom wavelengths, far from the visible. This work instead pumps close to the visible with a Ti:sapphire laser ‐ the source behind the original optical frequency combs and now becoming chip‐integrable‐ and lets silicon‐nitride waveguides convert it into efficient, octave‐spanning visible‐to‐infrared ...
Abdullah Alabbadi, Ewan Allan, Hanna Ostapenko, Pablo Castro‐Marín, Derryck T. Reid, Pascal Del'Haye   +5 more
wiley   +1 more source

Extreme properties of a compact and massive accreting black hole host in the first 500 Myr. [PDF]

Nat Commun
Tripodi R, Martis N, Markov V, Bradač M, Di Mascia F, Cammelli V, D'Eugenio F, Willott C, Curti M, Bhatt M, Gallerani S, Rihtaršič G, Singh J, Gaspar G, Harshan A, Judež J, Merida RM, Desprez G, Sawicki M, Goovaerts I, Muzzin A, Noirot G, Sarrouh GTE, Abraham R, Asada Y, Brammer G, Estrada-Carpenter V, Felicioni G, Fujimoto S, Iyer K, Mowla L, Strait V.   +31 more
europepmc   +1 more source

Beyond Directions: Symmetry‐Aware Rotation Sets for Triaxial Diffusion Encoding by Geometric Filter Optimization

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To improve the accuracy of diffusion‐weighted powder average signals for diffusion encoding with arbitrary b‐tensors. Methods We identify an intrinsic dihedral (D2$$ {D}_2 $$) symmetry of diffusion signals for arbitrary diffusion encoding, which defines their natural signal space (a quotient of 3D rotations).
Sune Nørhøj Jespersen, Filip Szczepankiewicz   +1 more
wiley   +1 more source

Oscillatory Dynamics and Energy Transport in Twisted Magnetic Flux Tubes of the Solar Photosphere. [PDF]

Sol Phys
Alanezy AS, Silva SSA, Ballai I, Verth G, Fedun V.   +4 more
europepmc   +1 more source

Human In Vivo Validation of Frequency‐Dependent QTI

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose The aim of this work is to investigate if q‐space trajectory imaging (QTI) waveforms can be designed to probe QTI metrics at a single centroid frequency under realistic experimental conditions for in vivo human brain imaging. Methods Realistic diffusion encoding waveforms based on double‐rotation gradient waveform and magic‐angle ...
Svenja Niesen, Marten Veldmann, Ali Ajouz, Tony Stöcker   +3 more
wiley   +1 more source