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University of Pennsylvania News
Fabrication Method Enables Novel Metamaterial Properties
PHILADELPHIA, Nov. 24, 2023 — In recent decades, researchers have fabricated metamaterials that interact with light in ways that go beyond the physical limits imposed on naturally occurring materials. A metamaterial is composed of arrays of “meta-atoms,” which have been fabricated into desirable structures on the scale of about 100 nm. The structure of arrays of meta-atoms facilitates precise light-matter interactions. However, the large size of meta-atoms relative to ordinary atoms, which are smaller than
Imaging Method Noninvasively Measures Placental Health
PHILADELPHIA, Aug. 24, 2022 — An optical technique for measuring placental blood flow and oxygenation in real time provides information about placental hemodynamics that could aid in the early detection of adverse pregnancy outcomes. The technique is the result of a...
On-Chip Neural Network Classifies Images Almost Instantaneously
PHILADELPHIA, June 17, 2022 — An optical deep neural network integrated on a chip could be a significant advancement for image classification technology. Its on-chip neural network can recognize and classify an image in less than a nanosecond. Further, the photonic neural...
Laser Endomicroscopy Enables Real-time Detection of Lung Cancer
PHILADELPHIA, May 23, 2022 — Researchers at the Abramson Cancer Center at the University of Pennsylvania have developed a method to detect lung cancer at the cellular level in real time during biopsy. The method ensures earlier detection of cancer cells that may have been too...
Metamaterial Tiles Perform in Vast Temperature Range, Support Highly Sensitive Measurements
WASHINGTON, D.C., Jan. 29, 2021 — Metamaterial tiles are poised to improve the sensitivity of telescopes currently under development at Simons Observatory in Chile. A multi-institutional team created the tiles, which have been rigorously tested and incorporated into the receivers of...
NSF Grant to Advance Sensing and Imaging Technologies for Precision Agriculture
ALEXANDRIA, Va., Aug. 21, 2020 — With a five-year, $26 million grant, the National Science Foundation (NSF) has established the Engineering Research Center for the Internet of Things for Precision Agriculture (ERC IoT4Ag). The center, which is headquartered at the University of...
Light Controls Electrical Properties in Quantum Materials
PHILADELPHIA, Aug. 7, 2019 — A new study from the University of Pennsylvania reports that Weyl semimetals, a class of quantum materials, have bulk quantum states whose electrical properties can be controlled using light. This work could contribute to a way to engineer and...
Light-Activated Dynamic Looping Triggers Gene Expression
PHILADELPHIA, July 26, 2019 — Using a technique called light-activated dynamic looping, or LADL, scientists at the University of Pennsylvania are investigating the role that genome folding plays in gene expression. The team has demonstrated how LADL can be used for quickly...
Diamond Metalens Could Improve Quantum Device Performance and Scalability
PHILADELPHIA, June 14, 2019 — At the chemical level, diamonds are no more than carbon atoms aligned in a 3D crystal lattice. Even a diamond that looks flawless contains defects that can absorb or emit light. Small defects in diamonds called nitrogen-vacancy (NV) centers hold...
Inverse-Designed Metastructures Operate with Light to Perform ‘Photonic Calculus’
PHILADELPHIA, March 27, 2019 — A research team at the University of Pennsylvania has demonstrated a metamaterial device that can function as an analog computer. Such processing typically requires complex systems of bulk optical elements like lenses, filters, and mirrors. The...
Microscopic Robots Powered by Light Could Aid Medical Diagnostics
PHILADELPHIA, March 12, 2019 — Using novel nanofabrication techniques, researchers from the University of Pennsylvania and Cornell University have built micro-robots made from silicon and powered by solar cells. One million functional microscopic robots can be produced from a...
For Quantum Computing, New Hardware Platform Based on 2D Materials
PHILADELPHIA, Feb. 13, 2019 — To harness the capability of quantum computing, hardware must be developed that can access, measure, and manipulate individual quantum states. In response to this need, researchers at the University of Pennsylvania have demonstrated a new hardware...
STORM Pioneer Wins One of Six $3M Breakthrough Prizes
SAN FRANCISCO, Oct. 19, 2018 — The Breakthrough Prize Foundation and its sponsors — Sergey Brin, Priscilla Chan and Mark Zuckerberg, Ma Huateng, Yuri and Julia Milner, and Anne Wojcicki — announced the recipients of their 2019 prizes on Oct. 17, 2018. The inventor of...
Agarwal Group Puts Spin on Photons
PHILADEPHIA, Oct. 1, 2018 — The University of Pennsylvania's (Penn) Agarwal Group, headed by professor Ritesh Agarwal, seeks to understand how light interacts with small-scale nanostructures. The group then uses that understanding to engineer useful and innovative...
Liquid Crystal Compound Lens Eyed for 3-D Imaging
PHILADELPHIA, May 21, 2015 — Liquid crystal can be controllably formed into compound lenses similar to those found in insects, a team from the University of Pennsylvania has demonstrated. These lenses produce sets of images with different focal lengths, a property that could be...
‘Digital’ Metamaterials Constructed from the Bit Up
PHILADELPHIA, Dec. 2, 2014 — There could be a simpler way to create metamaterials, ultimately leading to light-bending invisibility cloaks and other seemingly impossible devices. A team from the University of Pennsylvania has discovered that a metamaterial with a given...
Penn Researchers Get $8M to Study Effects of PDT on Lung Cancer
PHILADELPHIA, July 10, 2014 — An $8 million grant from the National Cancer Institute will fund a four-year study of the effects of photodynamic therapy (PDT) on a rare lung cancer associated with asbestos. The study, involving 102 patients diagnosed with malignant pleural...
4 Photonics Projects Get Defense Funding
WASHINGTON, June 3, 2014 — The U.S. Department of Defense has awarded funding totaling $28.3 million for four photonics graduate research projects under its Multidisciplinary University Research Initiative (MURI). Brief summaries of the projects follow. For further...
Goodman Prize Goes to Authors of Metamaterials Textbook
WEST LAFAYETTE, Ind., and ATLANTA, May 23, 2014 — Vladimir Shalaev of Purdue University and Wenshan Cai of the Georgia Institute of Technology have been named the 2014 recipients of the Joseph W. Goodman Book Writing Award. Their book, “Optical Metamaterials: Fundamentals and...
Optical Brain Monitoring for Better Stroke Care
PHILADELPHIA, March 20, 2014 — Advanced technology and simple body positioning could be key in providing acute stroke patients with more effective, individualized treatment in real time.
Metamaterials Perform 'Photonic Calculus'
PHILADELPHIA, AUSTIN, Texas, and BENEVENTO, Italy, Jan. 13, 2014 — The discovery that metamaterials can be designed to perform "photonic calculus" as lightwaves pass through them could give rebirth to analog computers.
Liquid Crystal ‘Flowers’ Into Lenses
PHILADELPHIA, Dec. 24, 2013 — A 3-D, liquid-crystal array shaped like a flower can be used as a lens similar to an insect’s compound eye, a team of material scientists, chemical engineers and physicists has found. The University of Pennsylvania team has been working to use...
Material Gives Visible Light an Infinite Wavelength
AMSTERDAM & PHILADELPHIA, Oct. 16, 2013 — A new metamaterial made from stacks of silver and silicon nitride nanolayers gives visible light a nearly infinite wavelength, an international team reports. The material could be used to make novel optical components or more efficient LEDs....
Nanoantennas improve infrared sensing
PHILADELPHIA – Nanoantennas with “slots” that correspond to mid-IR wavelengths are a new way to tune IR light into mechanical action – which could lead to more sensitive IR cameras and more compact chemical-analysis techniques. Existing IR...
Plasmonics help ‘bulk’ silicon emit visible light
PHILADELPHIA – A commonly used form of silicon has been made to emit broad-spectrum, visible light, but challenges remain before it can form practical electronic-photonic devices. As engineers move ever closer to the limits of electronic circuits, light is...
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May 2024
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