Localized Optical Field Enhancement Improves Light-Matter Interaction
Researchers demonstrated a mechanism for concentrating light at an extremely small scale, which can be used for a broad spectrum of wavelengths. The team, comprising scientists from Atomic and Molecular Physics, Delft University of Technology, and Cornell University, leveraged the topological properties of photonic crystals to concentrate light on a chip and achieve broadband localization of light.
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Researchers Trick the Eye into Seeing New Color
Using a technique called “Oz,” scientists at the University of California, Berkeley, have found a way to manipulate the human eye into seeing a new color — a saturated blue-green color the team has named “olo.”
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High-Voltage CMOS Backplane Enables Bright OLED Microdisplays
Scientists at the Fraunhofer Institute for Photonic Microsystems IPMS have developed a high-voltage CMOS backplane that enables exceptionally bright OLED-based microdisplays. The approach allows for full color maximum brightness over 10,000 candela per square meter (cd/m2) without compromising lifespan or reliability.
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Practical Aberration Correction Using Freeform Optics — Pushing the Boundaries of Laser System Performance
Thu, Jun 12, 2025 10:00 AM - 11:00 AM EDT
Many laser systems — whether they are for industrial, biomedical, or defense applications — are designed to create a well-defined output spot or beam; this is required for the laser process to be as efficient, productive, and effective as possible. Optical aberrations in the laser system (pointing, defocus, spherical, astigmatic, coma, etc.) come from a variety of sources and affect the extent to which the actual output spot (or beam) deviates from that of the design intent of the system. To compensate for aberrations, it is vital to make appropriate measurements of the aberrations, and then ideally represent them as Zernike coefficients. Then, it is possible to design a freeform surface — using refractive principles — as a freeform aberration compensator. If the freeform surface can be designed and manufactured with a fast turnaround, the aberration compensator can be regarded as an “in-build” solution. By making the freeform in fused silica using a precision direct write laser machining process, it demonstrates the manufacture and testing of aberration compensators that have extremely low scatter and low loss. These fused silica freeform aberration compensators can therefore be used in either extreme high-power applications, e.g., laser inertial fusion, or extremely sensitive low-light applications, e.g., fluorescence microscopy and cytometry. Presented by PowerPhotonic.
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Features
Ultraviolet Sources, A History of Lasers: Technology Roadmap, Lasers for Quantum, Ultrafast Laser Spectroscopy, Laser Micromachining, and Laser Fusion: A Luminary Perspective
Photonics Media is currently seeking technical feature articles on a variety of topics for publication in our magazine Photonics Spectra. Please submit an informal 100-word abstract to Jake Saltzman, Senior Editor, at Jake.Saltzman@Photonics.com, or use our online submission form www.photonics.com/submitfeature.aspx.
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