Results 61 to 70 of about 5,260 (217)

Two Micron‐Size Dark Dimensions

Fortschritte der Physik, Volume 73, Issue 8, August 2025.
Abstract Two extra dimensions of micron scale might simultaneously address the gauge and cosmological hierarchy problems. In this paper various observational bounds in scenarios with one and two large extra dimensions are examined, to see if they are compatible with the micron scale.
Luis A. Anchordoqui, Ignatios Antoniadis, Dieter Lüst   +2 more
wiley   +1 more source

Special Issue on Microlenses [PDF]

Micromachines, 2014
The study and application of microscale lenses and lens arrays have been actively researched in recent years; new approaches in the fabrication of microlenses and microlens arrays have emerged. Also, novel applications of these microlenses and microlens arrays have been demonstrated.
openaire   +3 more sources

Spin‐Orbit Photonics with Potato Starch Lenses

Advanced Optical Materials, Volume 13, Issue 21, July 25, 2025.
Native potato starch spherulites are introduced as volumetric optical elements that modulate both dynamic and geometric phases of light. These spherulites focus light and generate optical vortices via spin‐orbit interaction, functioning as polarization‐sensitive microlenses. Their unique radial anisotropy enables applications in vortex beam generation,
Petr Bouchal, Petr Viewegh, Petr Liška, Radim Chmelík, Zdeněk Bouchal   +4 more
wiley   +1 more source

Astrometric Microlensing by Primordial Black Holes with the Roman Space Telescope

The Astrophysical Journal
Primordial black holes (PBHs) could explain some fraction of dark matter and shed light on many areas of early-Universe physics. Despite over half a century of research interest, a PBH population has so far eluded detection.
James Fardeen, Peter McGill, Scott E. Perkins, William A. Dawson, Natasha S. Abrams, Jessica R. Lu, Ming-Feng Ho, Simeon Bird   +7 more
doaj   +1 more source

The First Planetary Microlensing Event with Two Microlensed Source Stars [PDF]

The Astronomical Journal, 2018
Abstract We present the analysis of the microlensing event MOA-2010-BLG-117, and show that the light curve can only be explained by the gravitational lensing of a binary source star system by a star with a Jupiter-mass ratio planet. It was necessary to modify standard microlensing modeling methods to find the correct light curve solution
D. P. Bennett, A. Udalski, C. Han, I. A. Bond, J.-P. Beaulieu, J. Skowron, B. S. Gaudi, N. Koshimoto, F. Abe, Y. Asakura, R. K. Barry, A. Bhattacharya, M. Donachie, P. Evans, A. Fukui, Y. Hirao, Y. Itow, M. C. A. Li, C. H. Ling, K. Masuda, Y. Matsubara, Y. Muraki, M. Nagakane, K. Ohnishi, H. Oyokawa, C. Ranc, N. J. Rattenbury, M. M. Rosenthal, To. Saito, A. Sharan, D. J. Sullivan, T. Sumi, D. Suzuki, P. J. Tristram, A. Yonehara, M. K. Szymański, R. Poleski, I. Soszyński, K. Ulaczyk, Ł. Wyrzykowski, D. DePoy, A. Gould, R. W. Pogge, J. C. Yee, M. D. Albrow, E. Bachelet, V. Batista, R. Bowens-Rubin, S. Brillant, J. A. R. Caldwell, A. Cole, C. Coutures, S. Dieters, D. Dominis Prester, J. Donatowicz, P. Fouqué, K. Horne, M. Hundertmark, N. Kains, S. R. Kane, J.-B. Marquette, J. Menzies, K. R. Pollard, C. Ranc, K. C. Sahu, J. Wambsganss, A. Williams, M. Zub   +67 more
openaire   +7 more sources

Fluorescence Lifetime Imaging for Quantification of Targeted Drug Delivery in Varying Tumor Microenvironments

Advanced Science, Volume 12, Issue 3, January 20, 2025.
Macroscopic fluorescence lifetime Forster resonance energy transfer (MFLI FRET) pre‐clinical imaging can non‐invasively quantify drug‐receptor engagement, which is required for therapeutic action, in tumors with varying tumor microenvironments. This study demonstrates that MFLI FRET is a powerful non‐invasive imaging approach to study the impact of ...
Amit Verma, Vikas Pandey, Catherine Sherry, Taylor Humphrey, Christopher James, Kailie Matteson, Jason T. Smith, Alena Rudkouskaya, Xavier Intes, Margarida Barroso   +9 more
wiley   +1 more source

MEASURING THE TIME DELAYS IN GRAVITATIONALLY LENSED QUASARS IN THE PRESENCE OF MICROLENSING

Radio Physics and Radio Astronomy, 2014
A method to measure the time delays in gravitationally lensed quasars is proposed, which provides a simple and transparent procedure to eliminate the effects of microlensing events.
V. S. Tsvetkova, V. M. Shulga, L. A. Berdina   +2 more
doaj   +1 more source

Inverse design of color routers in CMOS image sensors: toward minimizing interpixel crosstalk

Nanophotonics, Volume 13, Issue 20, Page 3895-3914, August 2024.
Abstract Over the past decade, significant advancements in high‐resolution imaging technology have been driven by the miniaturization of pixels within image sensors. However, this reduction in pixel size to submicrometer dimensions has led to decreased efficiency in color filters and microlens arrays.
Sangbin Lee, Jaehyun Hong, Joonho Kang, Junjeong Park, Jaesung Lim, Taeho Lee, Min Seok Jang, Haejun Chung   +7 more
wiley   +1 more source

Die Suche nach kalten, fremden Welten

Physik in unserer Zeit, Volume 55, Issue 3, Page 140-147, May 2024.
Die meisten der heute bekannten extrasolaren Planeten umkreisen ihren Mutterstern auf engen Umlaufbahnen in weniger als 100 Tagen. Gesteinsplaneten mit größeren Bahnradien sind von herausragender Bedeutung für Theorien der Planetenentstehung. Die Mikrogravitationslinsenmethode bietet eine hervorragende Möglichkeit, solche Planeten zu finden – und das ...
Markus Hundertmark, Yiannis Tsapras
wiley   +1 more source

Primordial Black Hole Dark Matter Simulations Using PopSyCLE

The Astrophysical Journal
Primordial black holes (PBHs), theorized to have originated in the early Universe, are speculated to be a viable form of dark matter. If they exist, they should be detectable through photometric and astrometric signals resulting from gravitational ...
Kerianne Pruett, William Dawson, Michael S. Medford, Jessica R. Lu, Casey Lam, Scott Perkins, Peter McGill, Nathan Golovich, George Chapline   +8 more
doaj   +1 more source