#Photonics

[materialsscienceandengineering]

An unprecedented feat: Printing 3D photonic crystals that completely block light

Photonic crystals are materials with repeating internal structures that interact with light in unique ways. We can find natural examples in opals and the vibrant colored shells of some insects. Even though these crystals are made of transparent materials, they exhibit a "photonic bandgap" that blocks light at certain wavelengths and directions. A special type of this effect is a "complete photonic bandgap," which blocks light from all directions. This complete bandgap allows for precise control of light, opening up possibilities for advancements in telecommunications, sensing, and quantum technologies. As a result, scientists have been working on different methods to create these advanced photonic crystals. While 1D and 2D photonic crystals have been used in various applications, unlocking the secret to producing 3D photonic crystals with a complete photonic bandgap in the visible range has been fraught with challenges due to the need to achieve nanoscale precise control of all three dimensions in the fabrication process.

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[beetlesink]

Diffraction gratings babyyyy

[reino-do-genio]

Harvard's Quantum Leap: Entangling Atoms Over 33 Kilometers

Harvard researchers have achieved a major milestone by entangling single atoms over 33 km using telecom fiber. This breakthrough in quantum communication technology paves the way for a future robust quantum internet, leveraging advanced quantum frequency conversion techniques and telecom-wavelength photons.

[mit]

With a quantum “squeeze,” clocks could keep even more precise time, MIT researchers propose

More stable clocks could measure quantum phenomena, including the presence of dark matter.

Jennifer Chu | MIT News

The practice of keeping time hinges on stable oscillations. In a grandfather clock, the length of a second is marked by a single swing of the pendulum. In a digital watch, the vibrations of a quartz crystal mark much smaller fractions of time. And in atomic clocks, the world’s state-of-the-art timekeepers, the oscillations of a laser beam stimulate atoms to vibrate at 9.2 billion times per second. These smallest, most stable divisions of time set the timing for today’s satellite communications, GPS systems, and financial markets.

A clock’s stability depends on the noise in its environment. A slight wind can throw a pendulum’s swing out of sync. And heat can disrupt the oscillations of atoms in an atomic clock. Eliminating such environmental effects can improve a clock’s precision. But only by so much.

A new MIT study finds that even if all noise from the outside world is eliminated, the stability of clocks, laser beams, and other oscillators would still be vulnerable to quantum mechanical effects. The precision of oscillators would ultimately be limited by quantum noise.

But in theory, there’s a way to push past this quantum limit. In their study, the researchers also show that by manipulating, or “squeezing,” the states that contribute to quantum noise, the stability of an oscillator could be improved, even past its quantum limit.

“What we’ve shown is, there’s actually a limit to how stable oscillators like lasers and clocks can be, that’s set not just by their environment, but by the fact that quantum mechanics forces them to shake around a little bit,” says Vivishek Sudhir, assistant professor of mechanical engineering at MIT. “Then, we’ve shown that there are ways you can even get around this quantum mechanical shaking. But you have to be more clever than just isolating the thing from its environment. You have to play with the quantum states themselves.”

The team is working on an experimental test of their theory. If they can demonstrate that they can manipulate the quantum states in an oscillating system, the researchers envision that clocks, lasers, and other oscillators could be tuned to super-quantum precision. These systems could then be used to track infinitesimally small differences in time, such as the fluctuations of a single qubit in a quantum computer or the presence of a dark matter particle flitting between detectors.

“We plan to demonstrate several instances of lasers with quantum-enhanced timekeeping ability over the next several years,” says Hudson Loughlin, a graduate student in MIT’s Department of Physics. “We hope that our recent theoretical developments and upcoming experiments will advance our fundamental ability to keep time accurately, and enable new revolutionary technologies.”

Loughlin and Sudhir detail their work in an open-access paper published in the journal Nature Communications.

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[peterbordes]

Lightmatter raises $155M at 1.2B valuation to accelerate growth and expand photonic chip deployment.

The Boston-based developer of photonic chips specialized for AI made headlines again for closing an additional $155 million in new funding and revealing its new valuation of $1.2 billion — making Lightmatter a “unicorn” startup company

[noosphe-re]

“Complex vector light fields have become a topic of late due to their exotic features, such as their non-homogeneous transverse polarisation distributions and the non-separable coupling between their spatial and polarisation degrees of freedom (DoF). In general, vector beams propagate in free space along straight lines, being the Airy-vector vortex beams the only known exception. Here, we introduce a new family of vector beams that exhibit novel properties that have not been observed before, such as their ability to freely accelerate along parabolic trajectories. In addition, their transverse polarisation distribution only contains polarisation states oriented at exactly the same angle but with different ellipticity. We anticipate that these novel vector beams might not only find applications in fields such as optical manipulation, microscopy or laser material processing but also extend to others.”

—Parabolic-accelerating vector waves, https://www.researchgate.net/publication/354011186_Parabolic-accelerating_vector_waves

Bo Zhao, Valeria Rodríguez-Fajardo at Colgate University, Xiaobo Hu at Harbin University of Science and Technology, Raul Hernandez-Aranda at Tecnológico de Monterrey, Benjamin Perez-Garcia at Tecnológico de Monterrey, Carmelo Rosales-Guzmán at Centro de Investigaciones en Optica

[mybam2u]

Afterlife/Otherside Plasmon-Polaritons projection experiment # 276

[raghava123]

[materialsscienceandengineering]

Using DNA origami, researchers create diamond lattice for future semiconductors of visible light

The shimmering of butterfly wings in bright colors does not emerge from pigments. Rather, photonic crystals are responsible for the play of colors. Their periodic nanostructure allows light at certain wavelengths to pass through while reflecting other wavelengths. This causes the wing scales, which are in fact transparent, to appear so magnificently colored. For research teams, the manufacture of artificial photonic crystals for visible light wavelengths has been a major challenge and motivation ever since they were predicted by theorists more than 35 years ago. "Photonic crystals have a versatile range of applications. They have been employed to develop more efficient solar cells, innovative optical waveguides, and materials for quantum communication. However, they have been very laborious to manufacture," explains Dr. Gregor Posnjak.

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[semiconductor-hub]

Photonics: Pioneering Light-Based Technologies

Photonics is the science and technology of generating, controlling, and detecting light. It underpins many modern technologies, including fiber optics, laser systems, imaging, and sensing devices. Photonics is fundamental to various industries, such as telecommunications, healthcare, manufacturing, and defense, enabling innovations in areas like high-speed internet, medical diagnostics, and advanced manufacturing processes. The field of photonics is rapidly expanding, driven by the need for faster, more efficient, and miniaturized optical devices that can meet the demands of next-generation applications.

The Photonics Market, valued at USD 910.70 billion in 2023, is anticipated to reach USD 1,642.58 billion by 2032, with a CAGR of 6.83% during the forecast period from 2024 to 2032.

Future Scope:

The future of photonics is set to be transformative, with advancements expected in quantum photonics, integrated photonic circuits, and biophotonics. These innovations will enable breakthroughs in quantum computing, high-resolution imaging, and optical communication. As the demand for higher data transmission speeds and more efficient energy use grows, photonics will play a crucial role in shaping the future of technology. Additionally, the integration of photonics with other emerging technologies, such as artificial intelligence and nanotechnology, will open new possibilities for applications in various fields.

Key Points:

Photonics is crucial in telecommunications, healthcare, manufacturing, and defense.

It enables high-speed data transmission, medical diagnostics, and advanced manufacturing.

Future growth will be driven by quantum photonics, integrated circuits, and biophotonics.

Trends:

Key trends in photonics include the miniaturization of photonic devices and the integration of photonics with electronics to create more efficient and compact systems. The rise of quantum photonics is another significant trend, with potential applications in quantum computing and secure communication. Additionally, there is a growing focus on sustainable photonics, aiming to develop energy-efficient light-based technologies. The increasing use of photonics in medical applications, such as optical imaging and laser surgery, is also a noteworthy trend, driving advancements in healthcare.

Application:

Photonics has a wide range of applications across various industries. In telecommunications, photonics is used in fiber optic communication systems to transmit data at high speeds over long distances. In healthcare, photonics technologies enable precise medical imaging, laser surgeries, and advanced diagnostic tools. Manufacturing industries utilize photonics for precision cutting, welding, and quality control. Additionally, photonics plays a critical role in defense applications, including laser-guided systems, night vision technologies, and secure communications.

Conclusion:

Photonics is a cornerstone of modern technology, driving innovations across multiple industries. As the field continues to evolve, with advancements in quantum photonics, integrated circuits, and biophotonics, it will play a pivotal role in shaping the future of communication, healthcare, and manufacturing. The ongoing integration of photonics with other technologies will further expand its applications, making it an indispensable part of the technological landscape.

Read More Details: https://www.snsinsider.com/reports/photonics-market-4193

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Email: info@snsinsider.comPhone: +1–415–230–0044 (US) | +91–7798602273 (IND)

[peterbordes]

Breaking Moore’s Law: Lightmatter Accelerates Progress Toward Light-Speed Computing.

Lightmatter, founded by three MIT alumni, is using photonic technologies to reinvent how chips communicate and calculate.

Our ability to cram ever-smaller transistors onto a chip has enabled today’s age of ubiquitous computing. But that approach is finally running into limits, with some experts declaring an end to Moore’s Law and a related principle, known as Dennard’s Scaling.

[nuadox]

The impact of structured light and AI on the future of communication

- By Nuadox Crew -

Structured light, which combines image processing with machine learning, significantly boosts information transmission by increasing data capacity and accuracy.

This method utilizes the spatial dimensions and multiple degrees of freedom of structured light patterns, enabling innovative communication and detection advancements.

The notable features of structured light include its two- and three-dimensional amplitude distribution. This can integrate effectively with image processing technology and achieve cross-medium information transmission through machine learning. Researchers Zilong Zhang and Yijie Shen proposed a method that uses complex mode coherent superposition states and spatial nonlinear conversion to enhance information capacity. By incorporating machine vision and deep learning, they achieved large-angle point-to-multipoint information transmission with a low bit error rate.

In their model, Gaussian beams achieve spatial nonlinear conversion (SNC) via a spatial light modulator, while convolutional neural networks (CNNs) identify the beams' intensity distribution. The study found that the encoding capacity of higher-order Hermite-Gaussian (HG) modes is superior to that of Laguerre-Gaussian (LG) modes, and spatial structured nonlinear conversion significantly improves mode encoding capacity.

To verify encoding and decoding performance, a 50×50-pixel color image was transmitted using 125 HG coherent superposition states, even under phase jitter conditions. Experiments showed that SNC modes can increase data capacity while maintaining low bit error rates, achieving 99.5% data recognition accuracy. Additionally, high-precision decoding was achieved under diffuse reflection conditions using multiple receiving cameras with observation angles up to 70°.

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Read more at Chinese Academy of Sciences/SciTechDaily

Scientific paper: “Spatial Nonlinear Conversion of Structured Light for Machine Learning Based Ultra-Accurate Information Networks (Laser Photonics Rev. 18(6)/2024)” by Zilong Zhang, Wei He, Suyi Zhao, Yuan Gao, Xin Wang, Xiaotian Li, Yuqi Wang, Yunfei Ma, Yetong Hu, Yijie Shen and Changming Zhao, 09 June 2024, Laser & Photonics Reviews. DOI: 10.1002/lpor.202470039

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[mybam2u]

Afterlife/Otherside Polymorphing Spirits projection experiment # 275

[lovelylonelymoonlight]

closest bruce comes to destroying the “brucie” persona is when he gets interviewed by a child and Cannot for the life of him Lie