Near-zero-dispersion soliton and broadband modulational instability Kerr microcombs in anomalous dispersion
Microresonators based frequency combs, microcombs, have attracted huge interest in the last decades for their revolutionary performance of compact size, flexible comb spacing, and broad bandwidth. Wide applications of microcombs including optical fre.....»»
Study unveils a new family of quantum anomalous Hall insulators
In recent years, physicists and material scientists have identified various new materials marked by interesting properties and quantum effects. These materials could prove highly valuable both as platforms to study quantum effects and for the develop.....»»
Team demonstrates an ultra-broadband tunable terahertz absorber of graphene and hierarchical plasmonic metamaterials
Perfect absorption arises from the strong interaction of valence electrons with light in a conducting material. Optical metamaterial is an effective approach to exploit the superior photon capture capability. Thus, the perfect absorbers could be achi.....»»
Cable ISP fined $10,000 for lying to FCC about where it offers broadband
Small ISP admitted lying to FCC about size of network to block funding to rivals. Enlarge / "Yes, we offer Internet at your address." (credit: Chev Wilkinson via Getty Images) An Internet service provider that admitted l.....»»
Counteracting effects on ENSO due to ocean chlorophyll interannual variability and instability in the tropical Pacific
In as study published in the journal Science China Earth Sciences and led by Prof. Rong-Hua Zhang (School of Marine Sciences, Nanjing University of Information Science and Technology), large perturbations in chlorophyll (Chl) were observed to coexist.....»»
Broadband internet just got redefined — again
The FTC has released an updated definition for broadband for the first time since 2015......»»
Ultra-flat optics for broadband thermal imaging
Long-wavelength infrared (LWIR) imaging holds critical significance across many applications, from consumer electronics to defense and national security. It finds applications in night vision, remote sensing, and long-range imaging. However, the conv.....»»
FCC scraps old speed benchmark, says broadband should be at least 100Mbps
Standard of 100Mbps down and 20Mbps up replaces old 25Mbps/3Mbps benchmark. Enlarge (credit: Getty Images | Yuichiro Chino) The Federal Communications Commission today voted to raise its Internet speed benchmark for the.....»»
ISPs keep giving false broadband coverage data to the FCC, groups say
Telcos accuse fixed wireless ISPs of claiming more locations than they serve. Enlarge (credit: Getty Images | Andrey Denisyuk) Internet service providers are still providing false coverage information to the Federal Comm.....»»
Republicans in Congress try to kill FCC’s broadband discrimination rules
Over 65 Republicans file resolution of disapproval, while lobby groups sue FCC. Enlarge / US Rep. Andrew Clyde (R-Ga.) speaks to the press on June 13, 2023, in Washington, DC. (credit: Getty Images | Michael McCoy) More.....»»
A breath of fresh air in plasmonic catalysis: Black gold and solar light"s renaissance
Prof. Polshettiwar's group at Tata Institute of Fundamental Research (TIFR), Mumbai has developed a novel "plasmonic reduction catalyst stable in air," defying the common instability of reduction catalysts in the presence of air. The catalyst merges.....»»
Tesla to recall 200,000 vehicles in U.S. to fix rearview glitch
The rearview malfunction, caused by software instability, might decrease the driver's visibility and increase the risk of a crash, NHTSA said......»»
Scientists discover the moon is shrinking, causing landslides and instability in lunar south pole
Earth's moon shrank more than 150 feet in circumference as its core gradually cooled over the last few hundred million years. In much the same way a grape wrinkles when it shrinks down to a raisin, the moon also develops creases as it shrinks. But un.....»»
Scientists show that quantum infrared spectroscopy can achieve ultra-broadband spectroscopic measurements
Our understanding of the world relies greatly on our knowledge of its constituent materials and their interactions. Recent advances in materials science technologies have ratcheted up our ability to identify chemical substances and expanded possible.....»»
Global cyber inequity skyrockets
There has been a sharp increase in cyber inequity globally, with 90% of executives warning that urgent action is needed to address it, according to the World Economic Forum. While increased geopolitical tensions and economic instability continue to c.....»»
FCC chair defends broadband discounts for poor people against Republican attack
Lawmakers criticized FCC for something that was decided by Congress, chair says. Enlarge / FCC Chairwoman Jessica Rosenworcel at a Senate subcommittee hearing on September 19, 2023 in Washington, DC. (credit: Getty Images | The.....»»
Research team uses water as a nonlinear medium for ultra-broadband white laser
Scientists are making significant strides in the development of ultrabroadband white laser sources, covering a wide spectrum from ultraviolet to far infrared. These lasers find applications in diverse fields such as large-scale imaging, femto-chemist.....»»
Developing a flat soliton microcomb source
Optical chip-related technology is the inevitable path to retain the validity of Moore's Law, which has become the consensus of academia and industry; it can effectively solve the speed and power consumption problems of electronic chips. This tech is.....»»
Using "Kerr solitons" to boost the power of transmission electron microscopes
When light goes through a material, it often behaves in unpredictable ways. This phenomenon is the subject of an entire field of study called "nonlinear optics," which is now integral to technological and scientific advances from laser development an.....»»
Ultra-short laser flashes on demand: Controllable light pulse pairs from a single-fiber laser
In an innovative approach to controlling ultrashort laser flashes, researchers from the Universities of Bayreuth and Konstanz are using soliton physics and two pulse combs within a single laser. The method has the potential to drastically speed up an.....»»
Future of wireless technology: Key predictions for 2024
Wi-Fi technology continues to evolve in ways that anticipate the needs of consumers, businesses, enterprise verticals, smart cities, and service providers, according to the Wireless Broadband Alliance. Tiago Rodrigues, CEO of the Wireless Broadband A.....»»