Results 201 to 210 of about 31,159 (264)

A Hadean timeline for the emergence of the RNA World. [PDF]

Nat Commun
Abramov O, Medvegy A, Kremer B, Mojzsis SJ.   +3 more
europepmc   +1 more source

Scanning‐Tip and Confocal Raman Characterization of Gold Nanoparticles as Plasmonic Structures for Molecular Sensing

Journal of Raman Spectroscopy, EarlyView.
We apply a sharp silicon tip, typically used for atomic force microscopy (AFM), as a nanoscale probe, and collect frequency‐shifted photons resulting from Raman scattering within the sharp tip. This approach allows us to map local electromagnetic fields in various plasmonic structures and study field “hotspots” with nanometer spatial resolution ...
Zhi Gao, Alexei V. Sokolov
wiley   +1 more source

Discovery of a star sensitive to the spin of Sagittarius A. [PDF]

Nature
Abd El Dayem K, Abuter R, Aimar N, Amaro-Seoane P, Berdeu A, Berger JP, Bourdarot G, Brandner W, Burkert A, Calderón D, Correia C, Cuadra J, Davies R, Defrère D, Delit L, Drescher A, Eisenhauer F, Esteras Otal L, Fabricius M, Feuchtgruber H, Flesch S, Förster Schreiber NM, Foschi A, Fournier Q, Garcia P, Garcia Lopez R, Generozov A, Genzel R, Gillessen S, Gonté F, Haubois X, Hönig SF, Houllé M, Joharle S, Kaufer A, Kammerer J, Kervella P, Kolb J, Kreidberg L, Labadie L, Lacour S, Lai O, Laugier R, Le Bouquin JB, Leftley J, Li R, Lopez B, Lutz D, Mang F, Mérand A, Millour F, Montargès M, Morujão N, Nowacki H, Nowak M, Oberti S, Osorno J, Ott T, Paumard T, Paladini C, Pappert S, Perets HB, Perraut K, Perrin G, Petrov R, Petrucci PO, Piran T, Pourré N, Rabien S, Ribeiro DC, Robbe-Dubois S, Sadun Bordoni M, Sanchez-Bermudez J, Santos D, Sari R, Sauter J, Scheithauer S, Scigliuto J, Shangguan J, Shimizu TT, Soulez F, Stadler J, Straubmeier C, Sturm E, Subroweit M, Sykes C, Tacconi LJ, Thévenet P, Urso I, Vincent F, Woillez J, Zins G, GRAVITY+ Collaboration.   +92 more
europepmc   +1 more source

Revealing the Resonant Physics of Open Photonic Time Crystals

Laser &Photonics Reviews, EarlyView.
ABSTRACT Photonic time crystals (PTCs) are media whose permittivity is modulated periodically in time, enabling momentum bandgaps and parametric amplification of light. Their realization at the nanoscale can revolutionize the study of light‐matter interactions.
Adrià Canós Valero, Sergei Gladyshev, David Globosits, Stefan Rotter, Egor A. Muljarov, Thomas Weiss   +5 more
wiley   +1 more source

Neptune's inner moons and rings are exposed icy body interiors. [PDF]

Sci Adv
Davis MR, Belyakov M, Wong I, Milby Z, Brown ME.   +4 more
europepmc   +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

Single-fiber reflectance spectroscopy system using unmodified clinical laser fibers for tissue optical property recovery for photodynamic therapy treatment planning. [PDF]

J Biomed Opt
Hannan MN, Baran TM.
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

Architectural and geotechnical aspects affecting earthquake resilience for the antique Egyptian Khufu pyramid. [PDF]

Sci Rep
ELGabry M, Hamed A, Yoshimura S, Hussein HM, Maklad M, Salama A.   +5 more
europepmc   +1 more source

Observation of a relativistic analog of the Brewster effect in electron-photon scattering. [PDF]

Nat Commun
Schaap B, Lenz M, Musumeci P.
europepmc   +1 more source