Article URL: https://en.wikipedia.org/wiki/Photon_sieve Comments URL: https://news.ycombinator.com/item?id=31150801 Points: 2 # Comments: 0

Multiphoton lithography (MPL) is a technique that uses ultra-short laser pulses to create complex three-dimensional (3D) structures at the micro- and nanoscale. It is based on the principle of multiphoton absorption (MPA), which occurs when two or more photons are simultaneously absorbed by a molecule, resulting in a nonlinear optical process.

Last time we looked at the potential for the Standard Model if it just had U(1) gauge symmetry or it just had SU(2) gauge symmetry.  [A gauge symmetry is a symmetry of the equations we use, bu…

The world of laser scanning microscopy is quickly evolving, thanks to the advent of fast and compact detector arrays. These arrays replace the typical single-element detector of traditional confocal laser scanning microscopes, enabling new and unique capabilities.

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In the quest to unravel the complexities of neural circuits, scientists are beginning to use genetically encoded voltage indicators (GEVIs) to visualize electrical activity in the brain. These indicators are crucial for understanding how neurons communicate and process information. However, the effectiveness of one-photon (1P) versus two-photon (2P) voltage imaging has remained a topic of debate. A recent study by…

In this video I discuss the behavior of photons/electromagnetic waves especially the aspect of interference. At the same time, I wanted to set an error stra...

Setting a new standard for resin printing

In their experiments, physicists at the University of Bonn and the University of Kaiserslautern-Landau observed the dimensional crossover from one to two dimensions in a harmonically trapped gas of photons (light particles) and studied its properties.

Make highly detailed 3D printed models

Manuel Quevedo-Lopez

We study the parametric resonance excitation of the electromagnetic field by a gravitational wave. We show that there is narrow band resonance. For an electromagnetic field in the vacuum the resonance occurs only in the second band, and its strength is thus suppressed by two powers of amplitude of the gravitational wave. On the other hand, in the case of an electromagnetic field in a medium with the speed of light…

University of Central Florida researcher Debashis Chanda, a professor at the NanoScience Technology Center, has developed a new technique to detect photons—elementary particles that span from visible light to radio frequencies and are instrumental in carrying cellular communication.

Many quantum sensors experience high levels of noise during measurements that severely degrade their performance. Now a new study reveals a technique for overcoming this noise to potentially boost the sensitivity of these devices up to a hundredfold.

A "beautiful effect" predicted by quantum electrodynamics (QED) can explain the puzzling first observations of polarized X-rays emitted by a magnetar—a neutron star featuring a powerful magnetic field, according to a Cornell astrophysicist.

We present detailed instructions for constructing and operating an apparatus to produce and detect polarization-entangled photons. The source operates by type-I spontaneous parametric downconversion in a two-crystal geometry. Photons are detected in coincidence by single-photon counting modules and show strong angular and polarization correlations. We observe more than 100 entangled photon pairs per second. A test…

Lasers are a significant historical invention with ubiquitous impact in society. The concept also has interdisciplinary applications as phonon lasers and atom lasers. A laser in one physical domain can be pumped by energy in another. Nevertheless, all lasers demonstrated in practice have only lased in one physical domain thus far.

Scientists just proved that one packet of light is enough to kickstart the whole process.

Compared with energy-integrating CT, ultrahigh-resolution photon-counting CT improves resolution and reduces radiation exposure in abdominal aortic angiography, a study finds.

Using a complex cast of metal-studded pigments, proteins, enzymes, and co-enzymes, photosynthetic organisms can convert the energy in light into the chemical energy for life. And now, thanks to a study published June 14 in Nature, we know that this organic chemical reaction is sensitive to the smallest quantity of light possible—a single photon.