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Physicists have been working hard to improve the accuracy of atomic clocks, which are the most precise timing devices currently available. A promising way to achieve higher accuracy is to utilize spin squeezed states in clock atoms.Spin squeezed states are entangled quantum states in which particles work together to counteract their inherent quantum noise. These states provide incredible potential...
IntroductionMetal halide perovskites have excellent optoelectronic properties and have become the undisputed "star" materials in the semiconductor field, attracting great attention from both academia and industry. With a large amount of research investment, the application of perovskite covers various optical and optoelectronic fields such as single photon sources, micro nano lasers, photodetector...
On quartz sheets, the angular rhombic boron nitride crystals with a thickness of only 1 to 3 microns are as thin as cicada wings, but their energy efficiency is 100 to 10000 times higher than traditional optical crystals. At the opening ceremony of the 2024 Zhongguancun Forum Annual Conference held on April 25th, the world's thinnest known optical crystal was listed as one of the top ten technolog...
Researchers at the University of California, Santa Barbara have made significant breakthroughs in laser technology, introducing a groundbreaking quantum dot mode-locked laser that allows for independent generation of amplitude and frequency modulation combs from a single device. This cutting-edge dual mode laser paves the way for the creation of small-sized and energy-efficient frequency combs for...
Us researchers report 8.1 μm wavelength quantum cascade laser (QCL) grown on silicon (Si) by MOCVD [S. Xu et al., Applications. Physics Letters, v123, p031110, 2023]. "There are no previous reports of QCL growth on silicon substrates by metal-organic chemical vapor deposition (MOCVD)," commented the team from the University of Wisconsin-Madison, the University of Illinois at Urbana-Champaign an...