Tag

Optics

All articles tagged with #optics

Sunlight-Powered Quantum Entanglement Demonstrated for the First Time
science6 days ago

Sunlight-Powered Quantum Entanglement Demonstrated for the First Time

A team used a Fresnel-lens concentrator to focus sunlight onto a crystal, generating polarization-based entangled photons without a laser. The photons achieved ~94% similarity to a perfectly entangled state and violated Bell’s inequality, marking a proof-of-principle step toward cheaper, energy-efficient quantum tech for satellites and remote stations—though a practical, deployable sun-powered entangler remains to be built and improved.

Photon Truncation Won’t Create Infinite Light, Scientists Say
science1 month ago

Photon Truncation Won’t Create Infinite Light, Scientists Say

UiO physicists explore what happens when you “cut” a photon by removing a reflecting mirror. The resulting state is a complex quantum superposition where the photon number can, in theory, range from zero to infinitely many, but in practice the expected count is finite and depends on how quickly the mirror is removed—the faster the removal, the more photons can appear, yet infinite photons would require an impossibly instantaneous action. The work also highlights that vacuum energy can transform into real photons near the boundary, illustrating the strange, wave‑particle nature of light in quantum regimes.

From hacker to space-light pioneer, Roelker bets on laser-powered space data
technology2 months ago

From hacker to space-light pioneer, Roelker bets on laser-powered space data

Dan Roelker, a former hacker and DARPA program manager, now leads Observable Space, where software and advanced optics are used to track satellites with sub-arcsecond precision and to enable high-bandwidth laser communications from space to Earth; the company emerged from a merge of OurSky and PlaneWave, won a Space Force contract, and just closed a $90 million Series A to scale telescope production and laser-link tech for orbital data centers and NASA’s Artemis missions.

AI Optics Boom: Nvidia Seeks 20x InP Capacity to Power Massive Clusters
technology2 months ago

AI Optics Boom: Nvidia Seeks 20x InP Capacity to Power Massive Clusters

Nvidia has asked suppliers to boost indium phosphide laser capacity by 20x through 2030 to support AI cluster networking, with suppliers countering at 12x; the InP optics market is projected to grow from about $1.9B in 2025 to $22.75B by 2030. Major players like Lumentum, Coherent, Broadcom, Mitsubishi, Sumitomo and AAOI are expanding capacity, driven by the shift to co-packaged optics that moves connections closer to chips to boost speed and cut power. Investors see optics as the next AI bottleneck, and Rosenblatt expects Coherent and Lumentum to benefit, while more speculative names like AXT and Lightwave Logic carry higher risk. In short, optics infrastructure is becoming a foundational piece of AI deployment, and Nvidia’s demand signals indicate multi-year growth, tempered by caution over overexpansion among suppliers.

Cosmic prank: ISS crew pull off optical illusion with Cygnus XL
space4 months ago

Cosmic prank: ISS crew pull off optical illusion with Cygnus XL

NASA astronauts Chris Williams and Jack Hathaway staged a lighthearted moment aboard the ISS on April 13, pretending Williams could 'hold' Northrop Grumman's Cygnus XL cargo spacecraft in an optical illusion from the Cupola while the two captured the vehicle with Canadarm2 after its Apr 11 launch. The Cygnus XL was delivering about 11,000 pounds of cargo and experiments to the station. The playful moment highlighted crew morale amid a high-profile cargo-ship capture and installation on the Earth-facing port.

Gold, Light, and Salt Unveil Nanoscale Forces in Real Time
science6 months ago

Gold, Light, and Salt Unveil Nanoscale Forces in Real Time

Chalmers University researchers have developed a simple platform using micrometer-sized gold flakes in a salt solution between two gold-coated glass plates. When illuminated, light trapped in nanometer-scale liquid cavities creates color changes that reveal the balance between Casimir attraction and electrostatic repulsion, enabling direct study of nanoscale surface forces and self-assembly with potential applications in medicine, biosensing, and materials science.

CW laser and sharp tip push optical imaging to 0.1 nm, revealing atoms
science6 months ago

CW laser and sharp tip push optical imaging to 0.1 nm, revealing atoms

A team uses a continuous-wave mid-infrared laser and a needle-sharp metal tip to squeeze light into sub-atomic gaps, producing near-field optical tunneling emission that resolves atomic-scale features down to about 0.1 nanometers—roughly 100,000 times smaller than conventional diffraction-limited optics. The method works with standard lasers and could enable widespread atomic-scale optical imaging in catalysts, semiconductors, and quantum materials, with findings published in Nano Letters.

Are Image-Stabilized Binoculars Ideal for Stargazing?
science7 months ago

Are Image-Stabilized Binoculars Ideal for Stargazing?

Image-stabilized binoculars significantly enhance stargazing by providing shake-free views, making them ideal for observing deep space objects, wildlife, and for travelers. They are especially useful for beginners and those without telescopes, though they tend to be more expensive and heavier due to their stabilization systems. High-quality models from brands like Canon, Fujifilm, and Nikon offer varying degrees of stabilization and magnification, catering to different needs and budgets.