Applied Physics Letters

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Broadband Ultrasonic Imaging Shows Defects in All Types of Concrete

WASHINGTON, Jan. 27, 2026 — Concrete structures like roads and bridges require nondestructive testing methods to identify interior defects without destroying their structure. Most methods send sound […]

Using Sound Waves to Detect Helium

WASHINGTON, Dec. 16, 2025 — Helium leaks are hard to detect. Helium is odorless, colorless, tasteless, and does not react with other chemical substances. Not only can […]

AC Instead of DC: A Game-Changer for VR Headsets and Near-Eye Displays

WASHINGTON, Nov. 4, 2025 — LEDs, or light-emitting diodes, are essential components in near-eye displays like virtual reality and augmented reality headsets and smart glasses, along with […]

Robotic Eyes Mimic Human Vision for Superfast Response to Extreme Lighting

WASHINGTON, July 1, 2025 — In blinding bright light or pitch-black dark, our eyes can adjust to extreme lighting conditions within a few minutes. The human vision […]

Laser-Treated Cork Absorbs Oil for Carbon-Neutral Ocean Cleanup

WASHINGTON, April 23, 2024 – Oil spills are deadly disasters for ocean ecosystems. They can have lasting impacts on fish and marine mammals for decades and wreak […]

Droplet Levitation Is a New Way To Explore Airborne Viruses and Microorganisms

WASHINGTON, July 18, 2023 – Self-sustained levitation of millimeter-sized droplets was recently discovered by researchers at Tyumen State University, in Russia, during an experiment to select combinations […]

The Roly-Poly Gold Rush

WASHINGTON, April 11, 2023 – The woodlouse goes by many names: roly-poly, pill bug, potato bug, tomato bug, butchy boy, cheesy bob, and chiggy pig, to name […]

Improving Image Sensors for Machine Vision

WASHINGTON, July 26, 2022 – Image sensors measure light intensity, but angle, spectrum, and other aspects of light must also be extracted to significantly advance machine vision. […]

Solar Cell Keeps Working Long After Sun Sets

WASHINGTON, April 5, 2022 – About 750 million people in the world do not have access to electricity at night. Solar cells provide power during the day, […]